document.write( "Question 535913: what number should be added to complete the square of the expression? \r
\n" ); document.write( "\n" ); document.write( "x^2 + 2/5x
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Algebra.Com's Answer #352052 by KMST(5328) $\"\"$ $\"About$

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In the square of a monomial, you have the square of each term and the double product, so
\n" ); document.write( " $\"%28x%2Ba%29%5E2=x%5E2%2B2ax%2Ba%5E2\"$
\n" ); document.write( "has the squares of $\"x\"$ and $\"a\"$
\n" ); document.write( "along with twice their product $\"2ax\"$
\n" ); document.write( " $\"x%5E2+%2B+%282%2F5%29x\"$ has the square of $\"x\"$
\n" ); document.write( "and the twice the product of $\"x\"$ and what?
\n" ); document.write( "I would say it's
\n" ); document.write( " $\"%282%2F5%29x=2%281%2F5%29x\"$
\n" ); document.write( "so it's twice the product of $\"x\"$ and $\"1%2F5\"$
\n" ); document.write( "To complete the square of $\"x%2B1%2F5\"$
\n" ); document.write( "you need $\"%281%2F5%29%5E2=1%2F25\"$ }
\n" ); document.write( " $\"%28x%2B1%2F5%29%5E2=x%5E2%2B+%282%2F5%29x%2B1%2F25\"$ \n" ); document.write( "

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