|X+Y-1|+|X-Y-3|=0
X2 + Y2 =
2是平方?
回答 (1)
✔ 最佳答案
Sol
|x+y-1|+|x-y-3|=0
x+y-1=0
x-y-3=0
(x+y-1)+(x-y-3)=0
2x-4=0
x=2
y=1-x=-1
x^2+y^2=4+1=5
收錄日期: 2021-04-30 21:36:50
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