SOLUTION: Factor each polynomial completely w^2 - 18w + 81

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Question 7843: Factor each polynomial completely
w^2 - 18w + 81
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Factor: w%5E2+-+18w+%2B+81
You need to find two integers whose product is 81 and whose sum is -18.
The first integers that come to mind are (-9)& (-9), why? because:
(-9)(-9) = +81 and (-9) + (-9) = -18
So, w%5E2+-+18w+%2B+81+=+%28w+-+9%29%28w+-+9%29 or %28w+-+9%29%5E2