已知x³+x²y+xy²+y³=5,x²+y²=10,求x+y的值详细的每一步
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已知x³+x²y+xy²+y³=5,x²+y²=10,求x+y的值详细的每一步
已知x³+x²y+xy²+y³=5,x²+y²=10,求x+y的值
详细的每一步
已知x³+x²y+xy²+y³=5,x²+y²=10,求x+y的值详细的每一步
x³+x²y+xy²+y³=5
x(x²+y²)+y(x²+y²)=5
(x²+y²)(x+y) =5
10(x+y)=5
x+y=1/2