已知x^2-4x+4与Iy-1I互为相反数,则式子(x/y-y/x)÷(x+y)的值是

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已知x^2-4x+4与Iy-1I互为相反数,则式子(x/y-y/x)÷(x+y)的值是已知x^2-4x+4与Iy-1I互为相反数,则式子(x/y-y/x)÷(x+y)的值是已知x^2-4x+4与Iy-

已知x^2-4x+4与Iy-1I互为相反数,则式子(x/y-y/x)÷(x+y)的值是
已知x^2-4x+4与Iy-1I互为相反数,则式子(x/y-y/x)÷(x+y)的值是

已知x^2-4x+4与Iy-1I互为相反数,则式子(x/y-y/x)÷(x+y)的值是
∵x^2-4x+4与Iy-1I互为相反数
Iy-1I≥0,
x^2-4x+4=(x-2)^2≥0
∴y=1,x=2
∴(x/y-y/x)÷(x+y)=(2-1/2)÷3=1/2

x/y-y/x)÷(x+y)=(2-1/2)÷3=1/2