document.write( "Question 69147: which of the following is a pattern for multiplying the sum and diffrence of the same terms, a + b\r
\n" ); document.write( "\n" ); document.write( "a. a2 + 2ab + b2
\n" ); document.write( "b. a2 + b2
\n" ); document.write( "c. a2 + ab + b2
\n" ); document.write( "d. a2 - b2
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Algebra.Com's Answer #49213 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Use FOIL to get:
\n" ); document.write( "(a+b)(a-b) = a(a-b)+b(a-b)
\n" ); document.write( "= a^2-ab+ab-b^2
\n" ); document.write( "=a^2-b^2
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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