Factorise: x cube-3x square-10x+24
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X³–3X²–10X+24 = 0
(X–1)(X²–2X–12) = 0
X–1=0 or X²–2X–12 = 0
X = 1 X = 1±root(13)
(X–1)(X²–2X–12) = 0
X–1=0 or X²–2X–12 = 0
X = 1 X = 1±root(13)
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