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Solve (x+y)^2+(x^2+2xy+y^2) and show your work

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The given expression to solve is


(x+y)^2+(x^2+2xy+y^2)

As we know that


(a^2+2ab+b^2)=(a+b)^2

Using the above formula we can write


x^2+2xy+y^2=(x+y)^2

Hence we can write


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