A={x丨x²-2x-80},C{x丨x²-3ax+2a²

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A={x丨x²-2x-80},C{x丨x²-3ax+2a²
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A={x丨x²-2x-80},C{x丨x²-3ax+2a²
A={x丨x²-2x-80},C{x丨x²-3ax+2a²

A={x丨x²-2x-80},C{x丨x²-3ax+2a²
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