12xsquare +x-3 factorise
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12x^2+x-3
=(12x^2+x-1)+1-3
= (12x^2+4x-3x-1)-2
= {4x (3x+1)-1 (3x+1)}-2
= (4x-1)(3x+1) -2
=(12x^2+x-1)+1-3
= (12x^2+4x-3x-1)-2
= {4x (3x+1)-1 (3x+1)}-2
= (4x-1)(3x+1) -2
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