Bài tập toán cơ bản số 30

Created by T. Madas
Question 18
Factorize each of the following quadratic expressions.

a) 3 x 2 − 5 x − 12 = ( 3 x + 4 )( x − 3)
b) 5 x 2 + 19 x − 4 = ( 5 x − 1)( x + 4 )
c) 3 x 2 − 16 x + 5 = ( 3 x − 1)( x − 5 )
d) 3 x 2 − 11x + 6 = ( 3 x − 2 )( x − 3)
e) 3 x 2 + x − 4 = ( 3 x + 4 )( x − 1)
f) 3 x 2 + x − 2 = ( 3 x − 2 )( x + 1)
g) 2 x 2 + 7 x + 5 = ( 2 x + 5 )( x + 1)
h) 3 x 2 + 11x − 4 = ( 3 x − 1)( x + 4 )

Created by T. Madas


Created by T. Madas
Question 19
Factorize each of the following quadratic expressions.

a) 2 x 2 + 7 x + 6 = ( 2 x + 3)( x + 2 )
b) 5 x 2 − 12 x − 9 = ( 5 x + 3)( x − 3)
c) 2 x 2 − 13x − 24 = ( 2 x + 3)( x − 8)
d) 3x 2 + 2 x − 8 = ( 3x − 4 )( x + 2 )
e) 2 x 2 + 13x + 15 = ( 2 x + 3)( x + 5)
f) 2 x 2 + 3 x − 20 = ( 2 x − 5 )( x + 4 )
g) 2 x 2 − 5 x − 18 = ( 2 x − 9 )( x + 2 )
h) 3x 2 + 22 x − 16 = ( 3x − 2 )( x + 8 )

Created by T. Madas