document.write( "Question 685206: what value should be added to each side to complete the square of:
\n" ); document.write( "x^2+20x=-8 \n" ); document.write( "

Algebra.Com's Answer #424377 by funmath(2933) $\"\"$ $\"About$

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what value should be added to each side to complete the square of:
\n" ); document.write( "x^2+20x=-8
\n" ); document.write( "When you have a binomial in this form:
\n" ); document.write( " $\"x%5E2%2Bbx\"$
\n" ); document.write( "There is a formula that tells you what will complete the square: $\"c=%28b%2F2%29%5E2\"$
\n" ); document.write( "For us...b=20
\n" ); document.write( " $\"c=%2820%2F2%29%5E2\"$
\n" ); document.write( " $\"c=10%5E2\"$
\n" ); document.write( " $\"highlight%28c=100%29\"$
\n" ); document.write( "************************************************************************
\n" ); document.write( " $\"x%5E2%2B20x%2B100=-8%2B100\"$
\n" ); document.write( " $\"%28x%2B10%29%5E2=98\"$
\n" ); document.write( "Some find it easier to visualize the end...guessing what it has to be to make a perfect square...that falls apart for most when fractions and decimals are introduced.
\n" ); document.write( "Happy Calculating!!! \n" ); document.write( "

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