Posted by **ReRe** on Wednesday, February 24, 2010 at 3:28am.

Multiply using the rule for the product of the sum and difference of two terms. Assume any variable exponents represent whole numbers.

(x - y + 11)(x - y - 11)

- Math -
**drwls**, Wednesday, February 24, 2010 at 8:11am
Have you learned the rule that they are suggesting that you use? I strongly adise doing so. In this case, what you have is the sum and difference of the terms "x-y" and "11".

The general rule is

(a + b) (a - b) = a^2 - b^2

Please avoid name changes and the posting of long lists of questions with no work shown.

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