SOLUTION: The area of a square birthday cake is 100 + 20w + w2. What is the side length of the cake?

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Question 880889: The area of a square birthday cake is 100 + 20w + w2. What is the side length of the cake?

Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
The area of a square is side squared. So, 100+20w+w^2 is side squared.
Take the square root to find the side.
(10+w)*(10+w) = 100+20w+w^2
Square root is 10+w