Question

If -1and2 are two zeroes of the polynomial 2x^3-x^2-5x-2 find the third zero

Answer 1

given,

-1 and 2 are zeros of polynomial 2x³-x²-5x-2

we know that sum of the zeros =

-b/a

so,

-1+2+β = -(-1)/2

1+β = 1/2

β = -1/2

so the third zero is -1/2

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