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

1 answer:

3 0

$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}$

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