Question

Use suitable identities to find the product of (2x + 7) (2x - 11).

Answer 1

Answer:

4x²-8x-77

Step-by-step explanation:

(z+a)(z+b)=z²=(a+b)z+ab

We can solve question using this identitiy

z=2x

a=7

b=(-11)

Therefore (2x + 7) (2x - 11)

                =(2x)² + [7+(-11)]2x+[7*(-11)]

                =4x² +(-4)2x+(-77)

                = 4x²-8x-77