If $x (x+y) = 27$ and $y (x+y) = 54$, what is the value of $(x+y)^2$?
Question:
If $x (x+y) = 27$ and $y (x+y) = 54$, what is the value of $(x+y)^2$?
Answer:
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If $x (x+y) = 27$ and $y (x+y) = 54$, what is the value of $(x+y)^2$?
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