document.write( "Question 70542This question is from textbook Beginning Algebra
\n" ); document.write( ": Find a value for k so that 9m^2- kn^2 will have the factors 3m + 7n and 3mn -7n.\r
\n" ); document.write( "\n" ); document.write( "I am confussed can someone lend me some help please. Thanks. \n" ); document.write( "

Algebra.Com's Answer #50360 by funmath(2933) $\"\"$ $\"About$

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Find a value for k so that 9m^2- kn^2 will have the factors 3m + 7n and 3mn -7n.\r
\n" ); document.write( "\n" ); document.write( "The difference of perfect squares factor like this:
\n" ); document.write( " $\"highlight%28a%5E2-b%5E2=%28a%2Bb%29%28a-b%29%29\"$
\n" ); document.write( "b^2=b*b
\n" ); document.write( "so:
\n" ); document.write( " $\"kn%5E2=7n%2A7n\"$
\n" ); document.write( " $\"kn%5E2=49n%5E2\"$
\n" ); document.write( " $\"highlight%28k=49%29\"$
\n" ); document.write( "Happy Calculating!!!! \n" ); document.write( "

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