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Rajan@2021
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If 2 and -2 are two zeroes of the polynomial (x^4+x³-34x²-4x+120), find all zeroes of the given polynomial.

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This is the basic and conceptual question from polynomials in which we have given a equation (x^4+x³-34x²-4x+120) and it is also given that 2 and -2 are its zeroes and we need to calculate all the zeroes of the given polynomial

Kindly give me a detailed solution of this question

RS Aggarwal, Class 10, chapter 2B, question no 15

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1 Answer

  1. eqn=x^4+344x+120
    (x+2)(x+2)32x(x+2)+60(x+2)
    (32x+60)(x+2)
    {(x2)+x(x2)30(x2)}(x+2)
    (+x30)(x2)(x+2)
    (x+6)(x5)(x2)(x+2)=0
    so x=6, 5, 2, 2

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