expand and simplify (x+7)(x-7)
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 :)
(x + 7)(x - 7)x² - 7x + 7x - 49x² - 49
