已知x≠y,x^2-x=y^2-y,求x+y的值.
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已知x≠y,x^2-x=y^2-y,求x+y的值.已知x≠y,x^2-x=y^2-y,求x+y的值.已知x≠y,x^2-x=y^2-y,求x+y的值.x²-x=y²-yx²
已知x≠y,x^2-x=y^2-y,求x+y的值.
已知x≠y,x^2-x=y^2-y,求x+y的值.
已知x≠y,x^2-x=y^2-y,求x+y的值.
x²-x=y²-y
x²-y²-x+y=0
(x+y)(x-y)-(x-y)=0
(x+y+1)(x-y)=0
∵x≠y
∴x+y+1=0
∴x+y=-1
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