If you mean: 9x2+3x-2 = (3x+2)(3x-1) when factored
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While it is possible to factor 3x2 from both of these and get 3x2(4 - 1), it's a lot easier to subtract 3x2 from 12x2 and get 9x2
Factor: 9x2 - 25.
(3x + 1)(x - 4)
9x2 + 9x - 10 =(3x - 2)(3x + 5)
9x2+2x-7 = (9x-7)(x+1) when factored