已知实数ab满足a²+b²-4a-6b+13=0,求a²+b²的值
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已知实数ab满足a²+b²-4a-6b+13=0,求a²+b²的值
已知实数ab满足a²+b²-4a-6b+13=0,求a²+b²的值
已知实数ab满足a²+b²-4a-6b+13=0,求a²+b²的值
a²+b²-4a-6b+13=0
(a²-4a+4)+(b²-6b+9)=0
(a-2)²+(b-3)²=0
a=2 b=3
a²+b²
=2²+3²
=13
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