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Algebra

posted by on .

How can this be? I am supposed to solve (-3-8i)-(-2-9i). Once it is broken down, you get (-3+2)-(8i-9i) I got -1+-1i, but my book said the answer is -1+i. Thanks for your help.

  • Algebra - ,

    The book is ccorrect: -i(8-9)=-i(-1)=i

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