If $x$ and $y$ are real, and $x^2 + y^2 = 1,$ compute the maximum value of $(x + y)^2.$
Question:
If $x$ and $y$ are real, and $x^2 + y^2 = 1,$ compute the maximum value of $(x + y)^2.$
Answer:
Let's think step by step.

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If $x$ and $y$ are real, and $x^2 + y^2 = 1,$ compute the maximum value of $(x + y)^2.$
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