Question

What is x^2-49? , please show work!

Answer 1

This is a "difference of squares" which is always factored as:

(a^2-b^2)=(a-b)(a+b) in this case:

(x-7)(x+7) that is what it is factored...

If you meant to solve for when it is equal to zero then there are two solutions:

x=±7 (x=-7 and +7)

Answer 2

If you take the square root of x and 49 then you will get that x = 7