SOLUTION: Please help me solve this equation: 5x2-3(x2-3x)+5x+7

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Question 445033: Please help me solve this equation: 5x2-3(x2-3x)+5x+7
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
5x2-3(x2-3x)+5x+7
5x^2-3x^2+9x+5x+7
2x^2+14x+7
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(-14+-sqrt[14^2-4*2*7])/2*2
x=(-14+-sqrt[196-56])/4
x=(-14+-sqrt140)/4
x=(-14+-11.83)/4
x=(-14-11.83)/4
x=(-25.83)/4
x=-6.458 ans.
x=(-14+11.83)/4
x=-2.17/4
x=0.54 ans.