Bài tập toán cơ bản số 29

Created by T. Madas
Question 16
Factorize each of the following quadratic expressions.

a) x 2 − 14 x + 45 = ( x − 5 )( x − 9 )
b) x 2 − 15 x + 50 = ( x − 5 )( x − 10 )
c) x 2 + 6 x − 40 = ( x − 4 )( x + 10 )
d) x 2 − 30 x + 56 = ( x − 2 )( x − 28 )
e) x 2 − 9 x − 52 = ( x − 13)( x + 4 )
f)

x 2 + 4 x − 45 = ( x − 5 )( x + 9 )

g) x 2 + 15 x + 56 = ( x + 7 )( x + 8 )
h) x 2 + 37 x − 360 = ( x − 8 )( x + 45 )

Created by T. Madas


Created by T. Madas
Question 17
Factorize each of the following quadratic expressions.

a) 2 x 2 − 5 x + 3 = ( 2 x + 1)( x − 3)
b) 2 x 2 − 11x + 15 = ( 2 x − 5 )( x − 3)
c) 3 x 2 − 10 x + 8 = ( 3 x − 4 )( x − 2 )
d) 2 x 2 − x − 10 = ( 2 x − 5 )( x + 2 )
e) 3 x 2 + 11x + 6 = ( 3 x + 2 )( x + 3)
f) 3 x 2 − 8 x + 4 = ( 3 x − 2 )( x − 2 )
g) 5 x 2 + 6 x − 8 = ( 5 x − 4 )( x + 2 )
h) 2 x 2 − 9 x − 18 = ( 2 x + 3)( x − 6 )

Created by T. Madas