SOLUTION: (m + n) /(m - n) + ( m - n) / (m + n) Determine sum. m^2 + n^2 + m^2 - n^2 (cross multiplied). Not sure if correct steps.

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Question 1176793: (m + n) /(m - n) + ( m - n) / (m + n)
Determine sum.
m^2 + n^2 + m^2 - n^2 (cross multiplied).
Not sure if correct steps.
Answer by greenestamps(13334) About Me  (Show Source):
You can put this solution on YOUR website!


Cross multiplication is not valid here.

If you have an EQUATION of the form a/b=c/d you can cross multiply to get ad=bc.

But there is no equation here (no equals sign). It's just an expression that is the sum of two fractions. Simplify by getting a common denominator.

%28m%2Bn%29%2F%28m-n%29%2B%28m-n%29%2F%28m%2Bn%29



%28m%5E2%2B2mn%2Bn%5E2%29%2F%28m%5E2-n%5E2%29%2B%28m%5E2-2mn%2Bn%5E2%29%2F%28m%5E2-n%5E2%29

%282m%5E2%2B2n%5E2%29%2F%28m%5E2-n%5E2%29