SOLUTION: what is 18x squared minus 9x minus9

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Question 697958: what is 18x squared minus 9x minus9
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

18x%5E2-9x-9
9x%5E2-9x%2B9x%5E2-9
%289x%5E2-9x%29%2B%289x%5E2-9%29
9x%28x-1%29%2B9%28x%5E2-1%29
9x%28x-1%29%2B9%28x-1%29%28x%2B1%29
%28x-1%29%289x%2B9%28x%2B1%29%29
9%28x-1%29%28x%2Bx%2B1%29
9%28x-1%29%282x%2B1%29
if we set it equal to zero we can solve for x
9%28x-1%29%282x%2B1%29=0....since 9%3C%3E0 only x-1=0 or 2x%2B1=0 or both will make equation true
so, if x-1=0....=>...than x=1
or if 2x%2B1=0....=>...than x=-1%2F2

see it on a graph:
+graph%28+600%2C+600%2C+-5%2C+5%2C+-15%2C+10%2C+9%28x-1%29%282x%2B1%29%29+