Two reals $a$ and $b$ are such that $a+b=7$ and $a^3+b^3=91$. Compute $ab$.
Question:
Two reals $a$ and $b$ are such that $a+b=7$ and $a^3+b^3=91$. Compute $ab$.
Answer:
Let's think step by step.

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Two reals $a$ and $b$ are such that $a+b=7$ and $a^3+b^3=91$. Compute $ab$.
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