document.write( "Question 352269: Given the function f(x)=4x^2-x+6, calculate f(x+5).\r
\n" ); document.write( "\n" ); document.write( "I know how to do functions, but this one has me stumped. I tried doing it the regular way, and it was wrong, so here are the answer choices.\r
\n" ); document.write( "\n" ); document.write( "A)4x^2+4x+106
\n" ); document.write( "B)4x^2+9x+25
\n" ); document.write( "C)4x^2+39x+101
\n" ); document.write( "D)4x^2-39x-111\r
\n" ); document.write( "\n" ); document.write( "I really need help on this because if I do the problem, I can figure out the outside numbers, but I don't know how to get the middle number. Thanks in advance!
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Algebra.Com's Answer #251770 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"f%28x%29=4x%5E2-x%2B6\" Start with the given function.\r
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\n" ); document.write( "\n" ); document.write( "\"f%28x%2B5%29=4%28x%2B5%29%5E2-%28x%2B5%29%2B6\" Replace each 'x' with 'x+5'\r
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\n" ); document.write( "\n" ); document.write( "\"f%28x%2B5%29=4%28x%5E2%2B10x%2B25%29-%28x%2B5%29%2B6\" FOIL\r
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\n" ); document.write( "\n" ); document.write( "\"f%28x%2B5%29=4x%5E2%2B40x%2B100-x-5%2B6\" Distribute.\r
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\n" ); document.write( "\n" ); document.write( "\"f%28x%2B5%29=4x%5E2%2B39x%2B101\" Combine like terms\r
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\n" ); document.write( "\n" ); document.write( "So the answer choice is C)
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