SOLUTION: 4. x^2 + 3x = 28 5.2x^2 + 9x - 5 = 0

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: 4. x^2 + 3x = 28 5.2x^2 + 9x - 5 = 0       Log On


   

Question 202447: 4. x^2 + 3x = 28


5.2x^2 + 9x - 5 = 0
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
4. x^2 + 3x = 28
x^2 + 3x - 28 = 0
(x+7)(x-4) = 0
x = -7 or x = 4
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5.2x^2 + 9x - 5 = 0
2x^2 + 10x - x -5 = 0
2x(x+5) -(x+5) = 0
(x+5(2x-1) = 0
x = -5 or x = 1/2
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Cheers,
Stan H.