SOLUTION: please solve x in the equation , x^2-x-12 equals 0

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Question 981274: please solve x in the equation , x^2-x-12 equals 0
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

+x%5E2-x-12=+0...to factor completely write -x as 3x-4x
+x%5E2%2B3x-4x-12=+0....group
+%28x%5E2%2B3x%29-%284x%2B12%29=+0
+x%28x%2B3%29-4%28x%2B3%29=+0
%28x-4%29%28x%2B3%29+=+0
solutions:
if %28x-4%29+=+0=>x=4}
if %28x%2B3%29+=+0=>x=-3
see it on a graph
+graph%28+600%2C+600%2C+-10%2C+10%2C+-15%2C+10%2C+x%5E2%2B3x-4x-12%29+