Question

(x+5)^2 - (x-5)^2 is factored, it can be written as Ax where A is a whole number. The value of A is?

Answer 1

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

(x+5)^2 - (x-5)^2
= (x+5-(x-5))(x+5+x-5)
= (10)(2x)
= 20x

So, A=20

Answer 2

thank for helping Steve.