Use the substitution y 3x + 1 to solve for5(3x +1)2 + 6(3x + 1) -8 0. – InterviewSolution

1.	Use the substitution y 3x + 1 to solve for5(3x +1)2 + 6(3x + 1) -8 0.
Answer» 5(3x+1)(3x+1) + 6(3x+1) - 8 = 0 3x + 1 = y 5yy + 6y - 8 = 0 5yy + 10y - 4y - 8 = 0 (5y-4)(y+2) = 0 y = -2 , 4/5 3x + 1 = -2 , 4/5 x = -1 , -1/15

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