Two reals $x$ and $y$ are such that $x-y=4$ and $x^3-y^3=28$. Compute $xy$.
Question:
Two reals $x$ and $y$ are such that $x-y=4$ and $x^3-y^3=28$. Compute $xy$.
Answer:
Let's think step by step.

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Two reals $x$ and $y$ are such that $x-y=4$ and $x^3-y^3=28$. Compute $xy$.
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