28 August, 14:38
X squared minus 9X - 12 equals negative 4X - 6
28 August, 16:05
Equation : x^2 - 9x - 12 = 4x - 6. add six to both sides and add 4x to both sides to get x^2 - 5x - 6 = 0. find two numbers that add to - 5 and multiply to - 6, which would be - 6 and 1. substitute in with x to get x^2 - 6x + 1x - 6 = 0. take out the x and the 1 to get x (x-6) + 1 (x-6) = 0. so x = - 1 and x = 6.
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