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Factorise 3xraise to the power 2 -x-4 |
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Answer» 3X^2-x-4 = 3x^2-(4-3)x-4 = 3x^2-4x+3x-4 = 3x^2+3x-4x-4 = 3x(x+1)-4(x+1) = (3x-4) (x+1) |
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