Bài tập toán cơ bản số 23

Created by T. Madas
Question 5
Simplify fully the following expressions.

a) 4 ( 2 x − 3) − 2 ( 3x − 8 ) = 2 x + 4
b) 5 ( 3x − 3) − 3 ( 5 x − 7 ) = 6
c) 9 x − 2 ( 3x − 4 ) − ( 7 − x ) = 4 x + 1
d) 8 − 2 ( 7 x + 1) − ( 3 − 5 x ) = 3 − 9 x
e) 7 ( 2 x − 5 ) − 5 ( 5 − 2 x ) = 24 x − 60

Created by T. Madas


Created by T. Madas
Question 6
Simplify fully the following expressions.

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)

a) 4 x ( x − 2 ) − 2 x 2 + 3x − 1 = 2 x 2 − 14 x + 2
b) 4 x ( 3 − x ) − 2 x ( x − 2 ) = −6 x 2 + 16 x
c) 2 x ( 3 x − 7 ) − 4 x − x ( 2 − 5 x ) = 11x 2 − 20 x

(

)

d) 4 x ( 3 x − 2 ) − 10 − 4 x − 5 x 2 = 17 x 2 − 4 x − 10

(

)

e) 4 2 x 2 − 3 − x ( 3 − x ) = 9 x 2 − 3x − 12

Created by T. Madas