alleryFactorise 3x^2 - 12 completely.
A3(x + 2)(x - 2)
B3(x + 2)^2
C(3x + 2)(x - 2)
D3(x - 2)^2
Answer & Solution
Correct answer: A. 3(x + 2)(x - 2)
Take out 3 to get 3(x^2 - 4), then apply the difference of squares.
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