kiem tra toan 9

<span class='text_page_counter'>(1)</span>Bµi kiÓm tra sè ch¬ng IV Môn: đại số 9 *********************************************************************************************** ******** Hä vµ tªn: §iÓm Lêi phª: Trêng THCS qu¶ng phóc Tæ KHTN. …………………………………….. …………………………………………………………………… …………………………………………………………………….. Líp: 9. …………………………………………………………………….. M· §Ò:01 BAØI 1 (4 ñieåm ) Giaûi caùc phöông trình sau: a) x2 - 3x + 14 = 0 b) x2 + 14x +45 = 0 c) 2002x2 + 4x - 2006 = 0 BAØI 2. (3ñieåm) Cho hai haøm soá y= 2x2 vaø y = x + 2 Vẽ đồ thị hai hàm số này trên cùng một mặt phẳng tọa độ Tìm tọa độ giao điểm hai đồ thị đó (bằng đồ thị ) BAØI 3. ( 3 ñieåm ) Cho phöông trình x2 + 4x + m – 1 = 0 a) Tìm m để phơng trình có hai nghiệm phân biệt. b) Cho biÕt x1 = 2. TÝnh nghiÖm con l¹i x2 c) Tìm giá trị của m để phương trình có hai nghiệm x1, x2 và x21 + x22 = 0 Bài làm ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................. ... Bµi kiÓm tra sè ch¬ng IV Môn: đại số 9 *********************************************************************************************** ******** Hä vµ tªn: §iÓm Lêi phª: Trêng THCS qu¶ng phóc Tæ KHTN. …………………………………….. …………………………………………………………………….

<span class='text_page_counter'>(2)</span> …………………………………………………………………….. Líp: 9. …………………………………………………………………….. M· §Ò: 02 BAØI 1. (4 ñieåm ) Giaûi caùc phöông trình sau: a) x2 - 6x + 14 = 0 b) x2 + 14x – 45 = 0 c) 2009x2 + 2x - 2011 = 0 BAØI 2. (3ñieåm) Cho hai haøm soá y= x2 vaø y = x + 2 Vẽ đồ thị hai hàm số này trên cùng một mặt phẳng tọa độ Tìm tọa độ giao điểm hai đồ thị đó (bằng đồ thị ) BAØI 3. ( 3 ñieåm ) Cho phöông trình x2 + 4x + n – 1 = 0 a) Tìm m để phơng trình có hai nghiệm phân biệt. b) Cho biÕt x1 = 2. TÝnh nghiÖm con l¹i x2 c) Tìm giá trị của m để phương trình có hai nghiệm x1, x2 và x21 + x22 = 0 Bài làm ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ............................................................................................................................................................................................... ................................................................................................................................................................................................ BiÓu ®iÓm M· §Ò: 02.

<span class='text_page_counter'>(3)</span>