(x - 4)(x + 3)
x = 4 , -3
x² - x - 12 = 0
(x + 3) (x - 4) = 0
x + 3 = 0; x - 4 = 0
x = -3 or x = 4
x^2-x-12=0
(x-4)(x+3)
(x-4)=0
x=4
(x+3)=0
x=-3
Therefore...
x=4,-3
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Verified answer
(x - 4)(x + 3)
x = 4 , -3
x² - x - 12 = 0
(x + 3) (x - 4) = 0
x + 3 = 0; x - 4 = 0
x = -3 or x = 4
x^2-x-12=0
(x-4)(x+3)
(x-4)=0
x=4
(x+3)=0
x=-3
Therefore...
x=4,-3