(x + 2)(x - 4)
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x2 - 3x - 40 = (x - 8) (x + 5)
20x2 - 27x -8 20 * -8 is -160, and -32 and 5 add to -27 20x2 - 32x + 5x - 8 4x(5x-8) + 1(5x-8) (4x + 1)(5x-8)
8
The equation x2 - 5x - 24 = 0 has the two solutions 8 and -3 for x.
m2 - 8m = 0Factor the expression on the left:m (m - 8) = 0If either factor is zero, then the two sides are equal:m - 8 = 0m = 8m = 0