document.write( "Question 4159: I have an extra credit problem in my college algebra class.
\n" ); document.write( "I need to solve for x from the standard quadratic equation ax^2 + bx + c=0 to end as a result as the quadratic formula! Any advice?
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Algebra.Com's Answer #1845 by raafatriad(1)\"\" \"About 
You can put this solution on YOUR website!
\"a%2Ax%5E2%2Bb%2Ax%2Bc=0\"
\n" ); document.write( "by complete square:
\n" ); document.write( "add and subtract \"b%5E2%2F%284%2Aa%29\"
\n" ); document.write( "\"a%2Ax%5E2%2Bb%2Ax%2Bc%2B%28b%5E2%2F%284%2Aa%29%29-%28b%5E2%2F%284%2Aa%29%29=0\"
\n" ); document.write( "Rewrite the equation
\n" ); document.write( "\"%28a%2Ax%5E2%2Bb%2Ax%2Bb%5E2%2F%284%2Aa%29%29-b%5E2%2F%284%2Aa%29%2Bc=0\"
\n" ); document.write( "Factor for a
\n" ); document.write( "\"a%2A%28x%5E2%2Bb%2Fa%2Ax%2Bb%5E2%2F%284%2Aa%5E2%29%29-b%5E2%2F%284%2Aa%29%2Bc=0\"
\n" ); document.write( "Factor the complete square \"%28x%5E2%2Bb%2Fa%2Ax%2Bb%5E2%2F%284%2Aa%5E2%29%29\"
\n" ); document.write( "\"%28x%5E2%2Bb%2Fa%2Ax%2Bb%5E2%2F%284%2Aa%5E2%29%29=%28x%2Bb%2F%282%2Aa%29%29%5E2\"
\n" ); document.write( "\"a%2A%28x%2Bb%2F%282%2Aa%29%29%5E2-b%5E2%2F%284%2Aa%29%2Bc=0\"
\n" ); document.write( "\"a%2A%28x%2Bb%2F%282%2Aa%29%29%5E2=b%5E2%2F%284%2Aa%29-c\"
\n" ); document.write( "\"a%2A%28x%2Bb%2F%282%2Aa%29%29%5E2=%28b%5E2-4%2Aa%2Ac%29%2F%284%2Aa%29\"
\n" ); document.write( "Multiply both sides by \"1%2Fa\"
\n" ); document.write( "\"%28x%2B%28b%2F%282%2Aa%29%29%29%5E2=%28b%5E2-4%2Aa%2Ac%29%2F%284%2Aa%5E2%29\"
\n" ); document.write( "Take the square root for both sides
\n" ); document.write( "\"x%2Bb%2F%282%2Aa%29=sqrt%28%28b%5E2-4%2Aa%2Ac%29%2F%284%2Aa%5E2%29%29\" or \"x%2Bb%2F%282%2Aa%29=-sqrt%28%28b%5E2-4%2Aa%2Ac%29%2F%284%2Aa%5E2%29%29\"
\n" ); document.write( "\"x=%28-b%29%2F%282%2Aa%29%2Bsqrt%28b%5E2-4%2Aa%2Ac%29%2F%282%2Aa%29\" or \"x=%28-b%29%2F%282%2Aa%29-sqrt%28b%5E2-4%2Aa%2Ac%29%2F%282%2Aa%29\"
\n" ); document.write( "\"x=%28-b%2B-sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29\"\r
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