Verify whether 2 is a zero of the polynomial x3 + 4x2 - 3x - 18 or not?

Asked by Topperlearning User | 26th Jul, 2017, 09:10: AM

Expert Answer:

p(x) = x3 + 4x2 - 3x - 18

Now, 2 will be a zero of the polynomial if p(2) = 0.

We have:

p(2) = (2)3 + 4(2)2 - 3(2) - 18

       = 8 + 16 - 6 - 18

       = 24 - 24

       = 0

Thus, 2 is a zero of the polynomial x3 + 4x2 - 3x - 18.

Answered by  | 26th Jul, 2017, 11:10: AM

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