document.write( "Question 174077: some students simplify 2x^2-32/x-4 as 2x-8/x-4 =2x-8. choose values of x to mshow this is not true. Then simplify it correctly. \n" ); document.write( "
Algebra.Com's Answer #129081 by stanbon(75887)\"\" \"About 
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The wrong way:
\n" ); document.write( "2x^2-32/x-4 as 2x-8/x-4 =2x-8
\n" ); document.write( "Example:
\n" ); document.write( "Let x = 2
\n" ); document.write( "You would get 2*4-32 /2-4 = 2*2-8
\n" ); document.write( "8-32/-2 = 4-8
\n" ); document.write( "-24/-2 = -4
\n" ); document.write( "12 = -4
\n" ); document.write( "Which is wrong.
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\n" ); document.write( "The Right way:\r
\n" ); document.write( "\n" ); document.write( "(2x^2-32)/(x-4)
\n" ); document.write( "------
\n" ); document.write( "= [2(x^2-16)]/(x-4)\r
\n" ); document.write( "\n" ); document.write( "= [2(x-4)(x+4)]/(x-4)\r
\n" ); document.write( "\n" ); document.write( "= 2(x+4)
\n" ); document.write( "==============
\n" ); document.write( "Example: Let x = 2
\n" ); document.write( "You get
\n" ); document.write( "(2*4-32)/(2-4) = 2(2+4)
\n" ); document.write( "(8-32)/-2 = 2(6)
\n" ); document.write( "-24/-2 = 12
\n" ); document.write( "12 = 12
\n" ); document.write( "Which is correct.
\n" ); document.write( "=====================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "
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