Factorise (by spiliting the middle term) 12x raise to 2 + 5x - 2
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Answer:
= x² - 3x + 2
= x² -(1+2)x + 2
= x² - 1x - 2x + 2
= x² - x - 2x + 2
= x(x -1) - 2(x - 1)
= (x-1) (x-2)
Therefore either x=1 and x=2
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