SOLUTION: Simplify the expression (n + 9)(n - 9)

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Question 376532: Simplify the expression (n + 9)(n - 9)

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

Simplifying the expression 

(n + 9)(n - 9)

n^2 - 81 Note:SUM of the inner product(9n) and the outer product(-9n) = 0