document.write( "Question 775690: Find the constant term that should be added to make the following expression a perfect-square trinomial. X^2+16x \n" ); document.write( "

Algebra.Com's Answer #473063 by Tatiana_Stebko(1539) $\"\"$ $\"About$

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$\"a%5E2%2B2ab%2Bb%5E2\"$ - a perfect-square trinomial
\n" ); document.write( " $\"x%5E2%2B16x=x%5E2%2B2%2Ax%2A8\"$
\n" ); document.write( "hence $\"a=x\"$ , $\"b=8\"$
\n" ); document.write( "the constant term that should be added is $\"b%5E2=8%5E2=64\"$
\n" ); document.write( "Answer: 64 \n" ); document.write( "

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