5. Factorise :
(i) x3 – 2x2 – x + 2
(1) x3 + 13x2 + 32x + 20
(v) x + x² - x - 1
(vii) x3 + 2x2 - x - 2
(ix) 3x3 + 5x2 - 16x - 2
(ii) x² – 3x² – 9x - 5
(iv) 2y3 + y2 – 2y - 1
(vi) x3 + x2 + x + 1
(viii) x3 + 3x2 - 7x - 6
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