document.write( "Question 1005083: Simplify the rational expression, if possible. Identify any excluded values.\r
\n" ); document.write( "\n" ); document.write( " $\"%28k-3%29%2F%287k-21%29\"$ \n" ); document.write( "

Algebra.Com's Answer #621387 by ikleyn(52800) $\"\"$ $\"About$

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\n" ); document.write( " $\"%28k-3%29%2F%287k-21%29\"$ =     (this ratio is defined if k=/= 3; otherwise it is not defined)\r
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\n" ); document.write( "\n" ); document.write( " $\"%28k-3%29%2F%287%2A%28k-3%29%29\"$ =     (reduce by (k-3) the numerator and the denominator)\r
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\n" ); document.write( "\n" ); document.write( "= $\"1%2F7\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So,    $\"%28k-3%29%2F%287k-21%29\"$ is defined everywhere except k=3, and \r
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\n" ); document.write( "\n" ); document.write( " $\"%28k-3%29%2F%287k-21%29\"$ = $\"1%2F7\"$ everywhere where the ratio in the left side is defined.\r
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