document.write( "Question 880889: The area of a square birthday cake is 100 + 20w + w2. What is the side length of the cake?
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Algebra.Com's Answer #531782 by JulietG(1812)\"\" \"About 
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The area of a square is side squared. So, 100+20w+w^2 is side squared.
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\n" ); document.write( "(10+w)*(10+w) = 100+20w+w^2
\n" ); document.write( "Square root is 10+w
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