Verify whether the values of x is zero of the polynomial or not ?p(x) – InterviewSolution

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1.

Verify whether the values of x is zero of the polynomial or not ?p(x) = (x – 1) (x + 2); x = – 1, – 2

Answer»

The value of p(x) at x = – 1 is

p(-1) = (-1 – 1) (-1 + 2)

=-2 x 1 =-2 ≠ 0

Hence x = – 1 is not a zero of p(x).

And the value of p(x) at x = – 2 is

p (- 2) = (- 2 – 1) (- 2 + 2) = – 3 x 0 = 0

Hence, x = – 2 is a zero of p(x).

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