Question

do both places help me I will make you brainly ​

Answer 1

4a^2- 9b^2

using identity:

a^2 – b^2 = (a+b) (a-b)

y^2 + (7-8)y + (7× -8 )

y^2 - y - 56

using identity :

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