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MATH / Let a,b, and c be real numbers such that a−7b+8c=4 and 8a+4b−c=7. Find a²−b²+c². · Discussion

Discussing Let a,b, and c be real numbers such that a−7b+8c=4 and 8a+4b−c=7. Find a²−b²+c². · MATH

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