Bài tập toán cơ bản số 28

Created by T. Madas
Question 14
Factorize each of the following quadratic expressions.

a) x 2 + 3 x − 28 = ( x − 4 )( x + 7 )
b) x 2 − 2 x − 24 = ( x − 6 )( x + 4 )
c) x 2 − 10 x + 21 = ( x − 3)( x − 7 )
d) x 2 + 14 x + 24 = ( x + 2 )( x + 12 )
e) x 2 − 12 x + 32 = ( x − 8 )( x − 4 )
f)

x 2 + 13 x − 30 = ( x − 2 )( x + 15 )

g) x 2 − 11x + 28 = ( x − 4 )( x − 7 )
h) x 2 + 12 x + 32 = ( x + 8 )( x + 4 )

Created by T. Madas


Created by T. Madas
Question 15
Factorize each of the following quadratic expressions.

a) x 2 − 3 x − 40 = ( x − 8 )( x + 5 )
b) x 2 − 14 x + 24 = ( x − 2 )( x − 12 )
c) x 2 + 13 x + 36 = ( x + 9 )( x + 4 )
d) x 2 − 17 x + 42 = ( x − 3)( x − 14 )
e) x 2 + 18 x + 45 = ( x + 15 )( x + 3)
f)

x 2 + 14 x + 40 = ( x + 10 )( x + 4 )

g) x 2 − 19 x + 48 = ( x − 16 )( x − 3)
h) x 2 − 8 x − 48 = ( x − 12 )( x + 4 )

Created by T. Madas