SOLUTION: 5x^2-9x-2 How do you identify a factor of this trinomial using the AC method?

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Question 46039: 5x^2-9x-2 How do you identify a factor of this trinomial using the AC method?
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
5x^2 - 9x - 2
a = 5 b = -9 c = -2
ac = -10
Factors of ac: -1,10 : -2,5 : 2,-5 : 1,-10
1,-10 sum up to b(-9)
5x^2 - 10x + x - 2
(5x^2 - 10) + (x - 2)
5x(x - 2) + 1(x - 2)
(5x + 1)(x - 2)