Question 1064535
12-5x-3x^2=0 
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3x^2 + 5x - 12 = 0
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3x^2 + 9x-4x - 12 = 0
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3x(x+3)-4(x+3) = 0
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(x+3)(3x-4) = 0
x = -3 or x = 4/3
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Cheers,
Stan H.
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