is -2 a zero of the function ? P(x)=x^3-x^2-4x+14

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is -2 a zero of the function ? P(x)=x^3-x^2-4x+14

Guest Oct 11, 2014

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Best Answer

+118723

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Is -2 a zero of the function ? P(x)=x^3-x^2-4x+14

If -2 is a zero then P(-2)=0

lets see if it works

$$P(-2)=(-2)^3-(-2)^2-4*-2+14=-8-4+8+14=10 \ne0$$

SO -2 is not a zero.

EXTRA INFO

this means that (x+2) IS NOT a factor of P(x)

Melody Oct 11, 2014

1⁺⁰ Answers

+118723

+5

Best Answer

Is -2 a zero of the function ? P(x)=x^3-x^2-4x+14

If -2 is a zero then P(-2)=0

lets see if it works

$$P(-2)=(-2)^3-(-2)^2-4*-2+14=-8-4+8+14=10 \ne0$$

SO -2 is not a zero.

EXTRA INFO

this means that (x+2) IS NOT a factor of P(x)

Melody Oct 11, 2014

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