-3x(1-3x)+5(-8x+2)=-4x-18

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1 Answer

-3x(1 - 3x) + 5(-8x + 2) =  -4x - 18

-3x + 9x^2 - 40x + 10 = -4x - 18

9x^2 - 43x + 7 = -4x - 18

9x^2 -39x + 25 = 0

using quadratic formula:

x = (39 +/- SQR(1521 - 4(9)(25)))/2(9)

x = (39 +/- SQR(621))/18

x = (39 +/- 3SQR(69))/18

x ~ 0.782, 3.551
by Level 6 User (23.1k points)

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