x^=2-xy y^=1-xy 则x^-y^ 多少啊

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x^=2-xyy^=1-xy则x^-y^多少啊x^=2-xyy^=1-xy则x^-y^多少啊x^=2-xyy^=1-xy则x^-y^多少啊x²-y²=(2-xy)-(1-xy)=1

x^=2-xy y^=1-xy 则x^-y^ 多少啊
x^=2-xy y^=1-xy 则x^-y^ 多少啊

x^=2-xy y^=1-xy 则x^-y^ 多少啊
x²-y²=(2-xy)-(1-xy)=1

x^2=2-xy
y^2=1-xy
相减：
x^2-y^2=(2-xy)-(1-xy)=1