Question

 Product of (2x+9y)(2x-9y) is:​

Answer 1

(2x+9y)(2x-9y)

2x(2x-9y)+9y(2x-9y)

4x^2 - 18xy + 18xy - 81y^2

4x^2 - 81y^2

HOPE THIS WILL BE HELPFUL..........

PLEASE FOLLOW ME...........................

Answer 2

Step-by-step explanation:

given equation is (2x+9y)(2x-9y)

it is in form of (a+b) (a-b)

we know (a+b) (a-b) =a^2-b^2

here a=2x,b=9y

so a^2-b^2=(2x)^2-(9y)^2=4x^2-81y^2

THEREFORE YOUR ANSWER IS

$4 {x}^{2} - 81 {y}^{2}$

I hope you are satisfied by my answer.