SOLUTION: simplify 3 Over a+2 - 2 over a-1 the answer was a-7 over(a+2) (a-1) i just didint understand this what was it asking me to do please show steps and what i should do.

Question 835145: simplify
3 Over a+2 - 2 over a-1 the answer was a-7 over(a+2) (a-1) i just didint understand this what was it asking me to do please show steps and what i should do.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
3 Over a+2 - 2 over a-1 the answer was a-7 over(a+2) (a-1)
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Enter it like this:
3/(a+2) - 2/(a-1) not with "over" "under" etc.
You can use 3 sets of braces { } to get

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To combine fractions, the denominators have to be the same. You need a "common denominator."
The product of the DENs always works. For this one, that's (a+2)*(a-1)

=
Now that the DENs are the same, you can combine the numerator terms.
=
=

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