Question

(x-7y) (x+7y) is equal to​

Answer 1

Answer:

x^2-49y^2

Step-by-step explanation:

use (a+b)(a-b)=a^2-b^2

Answer 2

Answer:

(x-7y)(x+7y)

=x(x+7y)-7y(x+7y)

=x²+7xy -7yx-49y²

=x²-49y²