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Posted by on Sunday, October 12, 2008 at 4:20pm.

Subtract and Simplify:

4a^2/(a-b)-(4b^2-8ab)/(b-a)
I have the answer as 4(a+b)^2/(a-b)

or should it be 4(a-b)^2/(a-b)

  • Math problem check - , Sunday, October 12, 2008 at 4:23pm

    just the numerator..

    4a^2-8ab + 4b^2, right?
    4(a-b)^2

    Now does that reduce with the denominator?

  • Math problem check - , Sunday, October 12, 2008 at 4:28pm

    Okay I have the answer as 4(a-b) is that right

  • Math problem check - , Sunday, October 12, 2008 at 4:37pm

    What about
    4a^2/(a-b)-(4b^2-8ab)/(b-a)
    I thought that you would multiple the second part of the equation by -1
    -(4b^2-8ab)/(b-a)
    to get the common LCD of a-b
    So I thought the equation would be 4a^2/(a-b) + (4b^2 + 8ab)/(a-b)

    I have the answer as 4(a+b)^2/(a-b)

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