Factorise:
(i) 3x $^{2}$ + 2x - 5

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Solution

$(i) 3 x^{2} + 2 x - 5 = 3 x^{2} + 5 x - 3 x - 5 = x (3 x + 5) - (3 x + 5) = (x - 1) (3 x + 5)$

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