document.write( "Question 629878: Solve Equation by completing square X^2-3x-4=0 \n" ); document.write( "

Algebra.Com's Answer #396568 by Tatiana_Stebko(1539) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"x%5E2-3x-4=0\"$
\n" ); document.write( "Use the formula $\"a%5E2-2ab%2Bb%5E2=%28a-b%29%5E2\"$
\n" ); document.write( "

\n" ); document.write( " $\"%28x-3%2F2%29%5E2-25%2F4=0\"$
\n" ); document.write( " $\"%28x-3%2F2%29%5E2=25%2F4\"$
\n" ); document.write( " $\"x-3%2F2=5%2F2\"$ or $\"x-3%2F2=-5%2F2\"$
\n" ); document.write( " $\"x=4\"$ or $\"x=-1\"$
\n" ); document.write( "Answer: -1, 4 \n" ); document.write( "

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