for all integers a and b, a² + b² = 0, 1, 2, 4 or 5 modulo 8. Deduce that there do not a and b such that a² + b² = 12345790.

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2. Prove that, for all integers a and b, a² + b² = 0, 1, 2, 4 or 5 modulo 8. Deduce that there do not
exist integers a and b such that a² + b² = 12345790.
Transcribed Image Text:2. Prove that, for all integers a and b, a² + b² = 0, 1, 2, 4 or 5 modulo 8. Deduce that there do not exist integers a and b such that a² + b² = 12345790.
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