Question

zero of the polynomial 4x^3-3x^2-6x+32 is

Please answer fast I have exam tomorrow. Ans : -2

Answer 1

Given,4x^3-3x^2-6x+32

by fail and trail method
let x=1
4×1^3-3×1^2-6×1+32
=4-3-6+32
=36-9
=27
therefore 1 is not zero of given polynomial.

let x=-2
4(-2)^3-3(-2)^2-6(-2)+32
=4×-8-3×4+12+32
=-32-12+12+32
=0
therefore -2 is zero of given polynomial.

Answer 2

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