P(x) = 6x3
+ 5x2 - 12x + 4 factorise
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p(x) = 6x³ + 5x² - 12x + 4
=> 6x³ - 7x² + 12x² - 14x + 4
=> x(6x² - 7x + 2) + 2(6x² - 7x + 2)
=> (x + 2) (6x² - 7x + 2)
=> (x + 2) (6x² - 3x - 4x + 2)
=> (x + 2) 3x(2x - 1) -2(2x - 1)
=> (x + 2) (3x - 2) (2x - 1)
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