document.write( "Question 979076: LCD of 1/x-7 and 3/x-1 \n" ); document.write( "

Algebra.Com's Answer #600363 by Theo(13342) $\"\"$ $\"About$

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(x-7) and (x-1) don't have a common factor, so just multiply them together.
\n" ); document.write( " $\"1%2F%28x-7%29\"$ becomes $\"%28x-1%29%2F%28%28x-1%29%28x-7%29%29\"$
\n" ); document.write( " $\"3%2F%28x-1%29\"$ becomes $\"%283%28x-7%29%29%2F%28%28x-1%29%28x-7%29%29\"$
\n" ); document.write( "you multiplied 1/(x-7) by (x-1)/(x-1)
\n" ); document.write( "you multiplied 3/(x-1) by (x-7)/(x-7)
\n" ); document.write( "note that (x-1)/(x-1) is equal to 1, so the net effect is to multiply 1/(x-7) by 1 which keeps the value the same.
\n" ); document.write( "ditto for multiplying by (x-7)/(x-7).
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