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(5x- )(x + ) mixed signs due to negative 12
Think combinations of the multiples of 12 that when multiplied by 5 will subtract to 17.
12: 6,2 or 3,4
5: 5,1
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4*5 = 20 - 3 = 17
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(5x-3)(x+4)
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x = 3/5
x = -4
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