SOLUTION: Factoring polynomials 36=1/2x(x+4)

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Question 171361: Factoring polynomials
36=1/2x(x+4)
Answer by checkley77(12844) About Me  (Show Source):
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36=1/2x(x+4)
36=X/2(X+4)
36=(X^2+4X)/2
X^2+4X=72
X^2+4X-72=0
USING THE QUADRATIC EQUATION:x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ WE GET:
X=(-4+-SQRT[4^2-4*1*-72])/2*1
X=(-4+-SQRT[16+288])/2
X=(-4+-SQRT304)/2
X=(-4+-17.4356)/2
X=(-4+17.4356)/2
X=13.4356/2
X=6.7178 ANS.
X=(-4-17.4356)/2
X=-21.4356/2
X=-10.7178 ANS.