Question 404692
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Hi
Solving:
 x(5x+17)=12
 5x^2 + 17x = 12
  5x^2 + 17x - 12 = 0
factoring
(5x -3)(x +4)= 0 Note:SUM of the inner product(-3x) and the outer product(20x) = 17x
(5x -3)=0
    x = 3/5
(x +4)= 0
    x = -4

CHECKING our Answer(s)***
 3/5(3+17 = 12
 -4(-3) = 12