factor

or x=6

(x+10)(x-6) = 0

\({x}^{2}+4x=60\)

Two ways to do it

Way One: factoring

\({x}^{2}+4x-60=0\)

\((x+10)(x-6)=0\)

\(x=-10\) or \(x=6\)

Way Two: completing the square

\({x}^{2}+4x+4=64\)

\({(x+2)}^{2}=64\)

\(x+2=±8\)

\(x=-2±8\)

\(x=-10\)​ or