30.Factorise each of the following polynomials: i) x 3 + 13x2 + 31x - 45 given that x + 9 is a factor. ii) 4x3 + 20x2 + 33x + 18 given that 2x + 3 is a factor.
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i) x 3 + 13x2 + 31x - 45 given that x + 9 is a factor ii) 4x3 + 20x2 + 33x + 18 given that 2x + 3 is a factor
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