factorise x sq minus x minus 12
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Answered by
0
x^2 - x - 12
= x^2 - 4x +3x -12
= x(x-4) + 3(x-4)
= (x+3) (x-4)
therefore x = 4 , -3
= x^2 - 4x +3x -12
= x(x-4) + 3(x-4)
= (x+3) (x-4)
therefore x = 4 , -3
Answered by
1
x² - x - 12
(x² -4x)+(3x-12)
x(x-4)+ 3(x-4)
(x+3)(x-4)
(x² -4x)+(3x-12)
x(x-4)+ 3(x-4)
(x+3)(x-4)
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