Question

expand and simplify (x+7)(x-7)

Answer 1

7(x+7)(x-7) is in the form (a+b)(a-b) so it's equal to $a^{2}- b^{2}$
Which give us:
(x+7)(x-7) = $x^{2} - 49$

Hope this Helps :)

Answer 2

(x + 7)(x - 7)
x² - 7x + 7x - 49
x² - 49