SOLUTION: (x/x+1) - (2/x-1) - 1 please explain/show this to me... i tried doing it and again, only got very partial credit . i dont understand the whole LCD thing with the negatives...

Question 127930: (x/x+1) - (2/x-1) - 1
please explain/show this to me... i tried doing it and again, only got very partial credit . i dont understand the whole LCD thing with the negatives...
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
(x/x+1) - (2/x-1) - 1 The LCD=(x+1)(x-1)
.
Multiply LCD times each fraction:
x(x+1)(x-1)/(x+1)=x(x-1)
2(x+1)(x-1)/(x-1)=2(x+1)
1(x+1)(x-1) The denominator is one so nothing cancels in the numerator.
.

=
=
.
Ed

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