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数学
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x+y=17,x²+y²=169,怎么解
人气:273 ℃ 时间:2020-04-30 06:43:36
解答
y=17-x
x²+﹙17-x﹚²=169
x²-17x+60=0
x₁=12,x₂=5
y₁=5,y₂=12
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