document.write( "Question 885280: determine the quadratic function F\r
\n" ); document.write( "\n" ); document.write( "vertex is (1, -1)
\n" ); document.write( "given point is (3, 7)\r
\n" ); document.write( "\n" ); document.write( "type answer in the form f(x)=ax^2+bx+c)\r
\n" ); document.write( "\n" ); document.write( "f(x)=
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Algebra.Com's Answer #535037 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Starting in standard form might be easier.\r
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\n" ); document.write( "\n" ); document.write( "\"y=a%28x-h%29%5E2%2Bk\", instructive model for standard form
\n" ); document.write( "\"y=a%28x-1%29%5E2-1\", more specific equation but without yet knowing a=whatStillUnknown
\n" ); document.write( "\"7=a%283-1%29%5E2-1\", allowing to find a solution for a.\r
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\n" ); document.write( "\n" ); document.write( "\"7=a2%5E2-1\"
\n" ); document.write( "\"7=4a-1\"
\n" ); document.write( "\"4a=7%2B1\"
\n" ); document.write( "\"4a=8\"
\n" ); document.write( "\"a=2\"
\n" ); document.write( "-
\n" ); document.write( "The function still in standard form is \"highlight%28f%28x%29=2%28x-1%29%5E2-1%29\".
\n" ); document.write( "You can simplify into general form if that is what you want.
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