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Factorise:(viii) -18+11x-x^2 |
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Answer» = -18+11x-x^2 = -{x^2-11x+18} = -{x^2-9x-2x+18} = -{x(x-9)-2(x-9)} = -(x-9)(x-2) therefore, value of x is equal to 2 or 9. |
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