document.write( "Question 705557: How do I write this square as a trinomial: (3u-1)^2 \n" ); document.write( "

Algebra.Com's Answer #434936 by jsmallt9(3758) $\"\"$ $\"About$

You can put this solution on YOUR website!
Method 1: One of the patterns you should have learned by now is:
\n" ); document.write( " $\"%28a-b%29%5E2+=+a%5E2-2ab%2Bb%5E2\"$
\n" ); document.write( "This pattern can be used to multiply $\"%283u-1%29%5E2\"$ with the \"a\" being \"3u\" and the \"b\" being \"1\":
\n" ); document.write( " $\"%283u-1%29%5E2\"$
\n" ); document.write( " $\"%283u%29%5E2-2%2A%283u%29%281%29+%2B%281%29%5E2\"$ (Note the parentheses. Always a good idea when using patterns!)
\n" ); document.write( " $\"9u%5E2-6u+%2B1\"$

\n" ); document.write( "Method 2:
\n" ); document.write( " $\"%283u-1%29%5E2\"$ means (3u-1)(3u-1). You can use FOIL to multiply this out. (After you multiply and then add like terms, you get the same answer as method 1 .) \n" ); document.write( "

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