document.write( "Question 1101646: How would I make the equation f(x)=[-7/80](x-0)(x-40), which is in intercept form, into standard form and then into vertex form? ([-7/80] is a fraction) \n" ); document.write( "

Algebra.Com's Answer #716251 by josgarithmetic(39617) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"f%28x%29=%28-7%2F80%29%28x-0%29%28x-40%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"f%28x%29=-%287%2F80%29%28x%5E2-40x%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"f%28x%29=-7x%5E2%2F80%2B%287%2F2%29x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight%28f%28x%29=-%287%2F80%29x%5E2%2B%287%2F2%29x%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"f%28x%29=-%287%2F80%29%28x%5E2-40x%2B%2840%2F2%29%5E2-%2840%2F2%29%5E2%29\"$ ------completing the square\r
\n" ); document.write( "\n" ); document.write( " $\"-%287%2F80%29%28x%5E2-40x%2B20%5E2-20%5E2%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-%287%2F80%29%28%28x-20%29%5E2-400%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-%287%2F80%29%28x-20%29%5E2%2B%287%2A400%2F80%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight%28f%28x%29=-%287%2F80%29%28x-20%29%5E2%2B35%29\"$ \n" ); document.write( "

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