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Math Help - Using Binomial Theorm to compute f

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    Using Binomial Theorm to compute f

    Hey, I was hoping someone could check and tell me if I have done the below question correctly
    The question asks that we use Binomial theorm and compute (2- i)^5

    The answer I get is ( -38 -119i). I for some reason think it is incorrect, could someone double check for me please and thank you!
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    Re: Using Binomial Theorm to compute f

    Quote Originally Posted by flametag3 View Post
    Hey, I was hoping someone could check and tell me if I have done the below question correctly
    The question asks that we use Binomial theorm and compute (2- i)^5

    The answer I get is ( -38 -119i). I for some reason think it is incorrect, could someone double check for me please and thank you!
    Yep. It's off.

    (2 - i)^5 = 2^5 - 5*2^4*i + 10*2^3*I^2 - 10*2^2*i^3 + 5*2*i^4 - i^5

    =~(32-80+10) + (-80+40-1)i

    Does this help?

    -Dan
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