Math polynomial and zeros help.. Please?

Hi everyone! I'm stuck on a math problem and have no clue how to do it. Can you please show me the steps on how to get the right zeros? Thanks!

For the polynomial, one zeros is given. Find the other zero.

x cubed + x squared + 3x -5 x= -1-2i


Thats it:

For each of the polynomials, one of the zeros is given. Find the other zeros.

x cubed + x squared +3x - 5, x = -1-2i

3 Answers

  • 1 decade ago
    Favorite Answer


    x - 2x = - 1 - 2i

    is this an answer?

    x to the fifth power minus two x equals negative 1 minus two i

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  • Anonymous
    1 decade ago

    Whenever you are given a complex root in the form a + bi, you know the other root (which is also complex) is a - bi

    So, the other root is -1 + 2i

    Hope this helps you! Please email if you want further clarification.

    Source(s): Math Homework Answers & Explanations at
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  • 1 decade ago

    I thought polynomials didn't have negatives?

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