SOLUTION: {{{(a+b)/(a-b) - (a-b)/(a+b)}}}

Question 291137:
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!



Put parentheses around all binomials:



The LCD is 

The first denominator  needs  to become the LCD
, so we multiply top and bottom of the first fraction
by 




The second denominator  needs  to become the LCD
, so we multiply top and bottom of the second fraction
by 



The denominators are now the same, so we make just one fraction by
indicating the subtraction of the two numerators over the common
denominator:



FOIL out the binomials in the top and keep parentheses around them but DO NOT
FOIL out the binomial in the denominator!



Now remove the parentheses:



Cancel the  and the 



Cancel the  and the 





Edwin

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