Question

Given that f(x)= 9x^2-180, find x

Answer 1

$9x^{2} - 180 = 0 9x^{2} = 180 Divide both sides by 9 x^{2} = 20 Square root both sides, and you get x = \sqrt{20} --\ \textgreater \ simplified: 2 \sqrt{5}$