# How to do I solve this problem? 3x^2−12=0

How to do I solve this problem? $3{x}^{2}-12=0$
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Collin Gilbert
You need to factor $3{x}^{2}-12$, which ends up being
3(x+2)(x−2)
and then set each of these (but ignore the 3) equal to zero and solve.
x+2=0
x+2−2=0−2
x=−2
and
x−2=0
x−2+2=0+2
x=2
So x=2,−2