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September 23rd, 2018, 11:17 AM   #1
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polynomials

Check the alternative CORRETA that presents one of the zeros of the complex polynomial P (x) = - i · x³ + 2 · x² - 2 + i?

a) The complex number i.
b) The whole number 1.
c) The integer -1.
d) The complex number 2 · i.

Last edited by skipjack; September 23rd, 2018 at 04:45 PM.
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September 23rd, 2018, 12:50 PM   #2
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Trivially b). Just plug them in.
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September 23rd, 2018, 12:59 PM   #3
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Quote:
Originally Posted by mathman View Post
Trivially b). Just plug them in.

I replace 1 in the equation, is that correct?
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September 23rd, 2018, 04:45 PM   #4
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Yes.
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