SOLUTION: Please help solve for x 1500=(120-2x)(x) Thanks

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Question 514779: Please help solve for x 1500=(120-2x)(x) Thanks
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
1500=(120-2x)(x)
1500= 120x -2x^2
2x^2-120x+1500
/2
x^2-60x+750
Find the roots of the equation by quadratic formula

a= 1 ,b= -60 ,c= 750

b^2-4ac= 3600 + -3000
b^2-4ac= 600
x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=%28-12%2B21%29%2F%2812%29
x1=( 60 + 24.49 )/ 2
x1= 42.25
x2=( 60 -24.49 ) / 2
x2= 17.75
m.ananth@hotmail.ca