document.write( "Question 331808: how can i find all the values of a undefined rational expression? like r + 6 / r^2-r-6? asap \n" ); document.write( "

Algebra.Com's Answer #237939 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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find all the values of a undefined rational expression? like
\n" ); document.write( " $\"%28r+%2B+6%29%2F%28r%5E2-r-6%29\"$
\n" ); document.write( ":
\n" ); document.write( "the expression is undefined when the denominator = 0, therefore solve
\n" ); document.write( "r^2 - r - 6 = 0
\n" ); document.write( "Factors to
\n" ); document.write( "(r-3)(r+2) = 0
\n" ); document.write( "two values
\n" ); document.write( "r = 3
\n" ); document.write( "and
\n" ); document.write( "r = -2
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Substitute these values into the denominator, r^2 - r - 6, and you will see
\n" ); document.write( "it makes the denominator 0, right? \n" ); document.write( "

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