Asked by Mike
                Okay, I'm working with ultiplying Polynomials, and I just can't figure this one out! Here it is:
(h+k)(h squared-2hk+3k squared)
haha, I don't know how to make an exponent on the computer :-), but anyway, please help me figure it out!
            
        (h+k)(h squared-2hk+3k squared)
haha, I don't know how to make an exponent on the computer :-), but anyway, please help me figure it out!
Answers
                    Answered by
            Reiny
            
    powers are usually written this way...
(h+k)(h^2 - 2hk + 3k^2)
which becomes
h^3 -2h^2k + 3hk^2 + kh^2 - 2hk^2 + 3k^3
= h^3 - h^2k + hk^2 + 3k^3
    
(h+k)(h^2 - 2hk + 3k^2)
which becomes
h^3 -2h^2k + 3hk^2 + kh^2 - 2hk^2 + 3k^3
= h^3 - h^2k + hk^2 + 3k^3
                    Answered by
            Mike
            
    oh, I tried to solve it and got 3hk^2+h^3   I'm guessing that's wrong?
    
                    Answered by
            Mike
            
    I solved it like this: h^3-2hk^2+3hk^2+1hk^2-2hk^2+3hk^2=3hk^2+h^3
    
                    Answered by
            Reiny
            
    for the terms inside
-2h^2k + h^2k = -h^2k
and
3hk^2 - 2hk^2 = hk^2
look at my expansion and compare it to yours,
a term in hk^2 is not the same as a h^2k term.
    
-2h^2k + h^2k = -h^2k
and
3hk^2 - 2hk^2 = hk^2
look at my expansion and compare it to yours,
a term in hk^2 is not the same as a h^2k term.
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