document.write( "Question 948099: Express the quadratic function in standard form
\n" ); document.write( "f(x) = -x^2+4x\r
\n" ); document.write( "\n" ); document.write( "must find the vertex, x-intercept and y-intercept\r
\n" ); document.write( "\n" ); document.write( "Please help!
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Algebra.Com's Answer #578644 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
\"f%28x%29=-x%5E2%2B4x\"
\n" ); document.write( "The term to add and subtract inside the parentheses is \"%28-4%2F2%29%5E2=4\".
\n" ); document.write( "\"-%28x%5E2-4x%2B4-4%29\"
\n" ); document.write( "\"-%28%28x%5E2-4x%2B4%29-4%29\"
\n" ); document.write( "\"-%28%28x-2%29%5E2-4%29\"
\n" ); document.write( "\"highlight%28f%28x%29=-%28x-2%29%5E2%2B4%29\"\r
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\n" ); document.write( "\n" ); document.write( "Vertex is (2,4) read directly from the function in standard form.\r
\n" ); document.write( "\n" ); document.write( "Solve for f(x)=0 to find x-intercepts.
\n" ); document.write( "Set x=0 to evaluate y-intercept.
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