document.write( "Question 835145: simplify \r
\n" ); document.write( "\n" ); document.write( "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. \n" ); document.write( "

Algebra.Com's Answer #503381 by Alan3354(69443) $\"\"$ $\"About$

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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\n" ); document.write( "Enter it like this:
\n" ); document.write( "3/(a+2) - 2/(a-1) not with \"over\" \"under\" etc.
\n" ); document.write( "You can use 3 sets of braces { } to get
\n" ); document.write( " $\"3%2F%28a%2B2%29+-+2%2F%28a-1%29\"$
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\n" ); document.write( " $\"3%2F%28a%2B2%29+-+2%2F%28a-1%29\"$
\n" ); document.write( "To combine fractions, the denominators have to be the same. You need a \"common denominator.\"
\n" ); document.write( "The product of the DENs always works. For this one, that's (a+2)*(a-1)
\n" ); document.write( " $\"3%2F%28a%2B2%29+-+2%2F%28a-1%29\"$
\n" ); document.write( "= $\"3%28a-1%29%2F%28%28a%2B2%29%2A%28a-1%29%29+-+2%28a%2B2%29%2F%28%28a%2B2%29%2A%28a-1%29%29\"$
\n" ); document.write( "Now that the DENs are the same, you can combine the numerator terms.
\n" ); document.write( "= $\"%283a-3%29%2F%28%28a%2B2%29%2A%28a-1%29%29+-+%282a-4%29%2F%28%28a%2B2%29%2A%28a-1%29%29\"$
\n" ); document.write( "= $\"%28a-7%29%2F%28%28a%2B2%29%2A%28a-1%29%29\"$ \r
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