Question

Find the product by using identity
(3-2x) (3 +7x)
​

Answer 1

Step-by-step explanation:

(x+a)(X+b) = x^2 +(a+b)X +ab

here X =3

a = -2x

b = 7x

using identity written above

(3-2x)(3+7x) = (3)^2 +(-2x+7x)3 +(-2x × 7x)

= 9+ 15x-21x^2

= -21x^2+15x+9

please mark BRAINIEST