Question

(x-9y)*(x+9y)
any answer​

Answer 1

a+b(a-b)=a²-b²

=x-9y(x+9y)

=x²-(9y)²

=x²-81y²

hope it helps you

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Answer 2

Answer:

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

here we use identity (a+b)(a-b)=a²-b²

x² -(9y)²

x²-81y²

i hope it helps u