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a²+b²+10 = 2(a-3b)
a²+b²+10 = 2a-6b
a²-2a+b²+6b+10 = 0
{(a-1)²-1}+b²+6b+10 = 0
(a-1)²+b²+6b+9 = 0
(a-1)²+(b+3)² = 0

よって、a-1 = 0 かつ b+3 = 0 より、
a = 1 ・・・⑩、 b = -3 ・・・⑪
となります。

YAMA.

ありがとうございます🙇‍♀️

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