Solve for x.−x2−7x−12=0 -x^2-7x-12=0 −x2−7x−12=0
First, factor using trinomials and remember that there might be more than one solution for the value of x x x:−x2−7x−12=0 -x^2-7x-12=0 −x2−7x−12=0
Divide by -1:x2+7x+12=0 x^2+7x+12=0 x2+7x+12=0
(x+3)(x+4)=0 (x+3)(x+4)=0 (x+3)(x+4)=0
Therefore:x+4=0 x+4=0 x+4=0
x=−4 x=-4 x=−4
Or:x+3=0 x+3=0 x+3=0
x=−3 x=-3 x=−3
x=−3,x=−4 x=-3,x=-4 x=−3,x=−4