factorise 4x^2 - x + 3
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4x^2 - x + 3
4x^2 - (4+3)x+3
4x^2 - 4x +3x+3
4x(x-1) +3(x-1)
(x-1) (4x+3)
4x^2 - (4+3)x+3
4x^2 - 4x +3x+3
4x(x-1) +3(x-1)
(x-1) (4x+3)
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