document.write( "Question 895015: Find f(k) when f(x)=3x^2 + 4x + 5
\n" ); document.write( "I dont understand what to do with the f(k)? Please explain to me how to solve this problem.
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Algebra.Com's Answer #542507 by harpazo(655)\"\" \"About 
You can put this solution on YOUR website!
f(k) means to replace every x you see in the function with k.\r
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\n" ); document.write( "\n" ); document.write( "f(k) = 3k^2 + 4k + 5\r
\n" ); document.write( "\n" ); document.write( "Did you follow?\r
\n" ); document.write( "\n" ); document.write( "For more practice, do this one on your own.\r
\n" ); document.write( "\n" ); document.write( "Find f(apple) = 3x^2 + 4x + 5.\r
\n" ); document.write( "\n" ); document.write( "Replace every x with apple and you're done.\r
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