document.write( "Question 768084: f(x)=3x/(x-4)(x+4) \n" ); document.write( "
Algebra.Com's Answer #468053 by josgarithmetic(39616)\"\" \"About 
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\"f%28x%29=3x%2F%28%28x-4%29%28x%2B4%29%29\"\r
\n" ); document.write( "\n" ); document.write( "Critical points at \"x=-4\" and \"x=4\". Also f crosses x axis at \"x=0\".\r
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\n" ); document.write( "\n" ); document.write( "The THREE critical points form four intervals of the horizontal x axis. Vertical asymptotes at x=-4 and x=4.\r
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\n" ); document.write( "\n" ); document.write( "INTERVALS_______________________SIGN
\n" ); document.write( "(-infin, -4)________(-)/(- -)_________(-)
\n" ); document.write( "(-4, 0)_____________(-)/(- +)_________(+)
\n" ); document.write( "(0, +4)_____________(+)/(- +)_________(-)
\n" ); document.write( "(+4, infin)_________(+)/(+ +)_________(+)\r
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\n" ); document.write( "\n" ); document.write( "\"graph%28300%2C300%2C-6%2C6%2C-20%2C20%2C3x%2F%28%28x-4%29%28x%2B4%29%29%29\"
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