document.write( "Question 905711: for F(x) = 3x to the 2 power, find F(x+h)-f(x)
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Algebra.Com's Answer #549331 by nerdybill(7384)\"\" \"About 
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for F(x) = 3x to the 2 power,
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\n" ); document.write( "f(x) = 3x^2 (given)
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\n" ); document.write( "f(x+h) = 3(x+h)^2
\n" ); document.write( "f(x+h) = 3(x+h)(x+h)
\n" ); document.write( "f(x+h) = 3(x^2+2hx+h^2)
\n" ); document.write( "f(x+h) = 3x^2+6hx+3h^2
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\n" ); document.write( "so, we substitute the above into:
\n" ); document.write( "[F(x+h)-f(x)]/h
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\n" ); document.write( "[3x^2+6hx+3h^2 - 3x^2]/h
\n" ); document.write( "[6hx+3h^2]/h
\n" ); document.write( "6x+3h (this is what they're looking for)\r
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