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Posted by on Thursday, October 15, 2009 at 8:51pm.

The answer for (7+5i)+(-4+2i) is 3+7i. But I got -38-6i. I combined -28 and 10i^2 to get -38, and I combined -20i and 14i to get -6il So all together this was -28+-6i+-10, which resulted in -38-6i. Could you please tell me where I went wrong?

  • Algebra II - , Thursday, October 15, 2009 at 8:58pm

    (7+5i)+(-4+2i)
    The answer is for an addition.
    You did a multiplication. Hope that explains it.

  • Algebra II - , Thursday, October 15, 2009 at 9:16pm

    (7+5i) + (-4+2i)=> 7+5i-4+2i :.
    7-4+5i+2i = 3 + 7i

  • Algebra II - , Thursday, October 15, 2009 at 9:17pm

    Exactly! :)

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