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The area of a square rug can be represented by the expression 100x^2+60x+9. Write an expression to represent the length of each side of the rug.

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ChinjeolhanYeonghon
a^2+2ab+b^2=(a+b)^2
If 100x^2 is a^2 and 60x is 2ab and 9 is b^2,
Then a is 10x and b is 3, and (a+b)^2 is (10x+3)^2 so the area of a square rug is one side squared so one side can be written as 10x+3

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