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Anonymous
7(x - 1)(x + 3)
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2x2+14x
Yes because if x2-14x+49 then it is (x-7)(x-7) when factored
x=7
14x2 - 39x - 35 = (7x + 5)(2x - 7)
(x - 16)(x + 2) x = 16 or -2