document.write( "Question 966469: If f(x) = x(x+2), find (f(x+h)-f(x-h))/2h \n" ); document.write( "
Algebra.Com's Answer #590685 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "If \"f%28x%29+=+x%28x%2B2%29\", find \"%28f%28x%2Bh%29-f%28x-h%29%29%2F2h\"\r
\n" ); document.write( "\n" ); document.write( "first find
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\n" ); document.write( "\"f%28x-h%29=%28x-h%29%28%28x-h%29%2B2%29=%28x-h%29%28x-h%2B2%29=h%5E2-2hx-2h%2Bx%5E2%2B2x\"\r
\n" ); document.write( "\n" ); document.write( "then you have:\r
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\n" ); document.write( "\n" ); document.write( "\"%28f%28x%2Bh%29-f%28x-h%29%29%2F2h=%284hx%2B4h%29%2F2h\"\r
\n" ); document.write( "\n" ); document.write( "\"%28f%28x%2Bh%29-f%28x-h%29%29%2F2h=4h%28x%2B1%29%2F2h\"\r
\n" ); document.write( "\n" ); document.write( "\"%28f%28x%2Bh%29-f%28x-h%29%29%2F2h=2%28x%2B1%29\"\r
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