document.write( "Question 1023872: My math book and the algebra app always leave problems unfinished. They say [(a^2-b^2)/(c+d)/(a-b)/(c^2-d^2)]=[(a+b)(c-d)]/(1). I think the answer is (ac-ad+bc-bd). Can you explain why everything leaves the problem unfinished? \n" ); document.write( "

Algebra.Com's Answer #639354 by FrankM(1040) $\"\"$ $\"About$

You can put this solution on YOUR website!
The key thing to understand this is that $\"a%5E2-b%5E2\"$ factors to $\"%28a-b%29%28a%2Bb%29\"$ \r
\n" ); document.write( "\n" ); document.write( "Once you see this, the a-b factor in both numerator and denominator cancel. Same process for the c-d factor. \n" ); document.write( "

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