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Factorise x^3 - 3x^2 - 9x …

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Factorise x^3 - 3x^2 - 9x - 5

    • Posted by Rshi . 4 years, 11 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Ujjawal Verma 4 years, 11 months ago

    F(x)=x^3 - 3x^2 - 9x - 5 F(-1)=(-1)^3 - 3(-1)^2 - 9(-1) -5 = -1-3+9-5 = -4+4 =0 So one factor is (x+1) Now, x^3 -3x^2 - 9x-5 ÷ x+1 Again, after dividing X^2 + 4x + 5 X^2 - x +5x + 5 X(X-1) - 5(X-1) (X - 5) ( X-1) ans...............

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