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.
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)
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1 answer