a= 10, b= -7, c=-12
ac=10 x -12
ac=-120
120={1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60,120}
8 x - 15
10x + 8x- 15x -12x
(10x + 8x) - (15x - 12x)
2(5x + 4x) - 3(5x + 4x)
(2 - 3) ( 5x + 4x)
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10x² - 7x - 12 = (5x + 4)(2x - 3)
It is (x-3)(x-4) when factored
You find two numbers whose sum is -7 and product is +10. x2 - 7x + 10 = (x - 2)*(x - 5)
(2x + 1)(3x - 5)
It is: x(x+7) when factorized
7x+10=31x so 10=31x-7x or 10 =24x in which case x=10/24 or 5/12