You can put this solution on YOUR website! -3(x+2)^2=-18
-3(X^2+4X+4)=-18
-3X^2-12X-12+18=0
3X^2+12X-6=0
x=(-12+-SQRT[12^2-4*3*-6])/2*3
x=(-12+-sqrt[144+72])/6
x=(-12+-sqrt216)/6
x=(-12+-14.697)/6
x=(-12+14.697)/6
x=2.697/6
x=.449 ans.
x=(-12-14.697)/6
x=-26.697/6
x=-4.449 ans.