a方+b方+4a+5-2b=0,求a-b分之a+b

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a方+b方+4a+5-2b=0,求a-b分之a+ba方+b方+4a+5-2b=0,求a-b分之a+ba方+b方+4a+5-2b=0,求a-b分之a+ba^2+b^2+4a+5-2b=0a^2+4a+4

a方+b方+4a+5-2b=0,求a-b分之a+b
a方+b方+4a+5-2b=0,求a-b分之a+b

a方+b方+4a+5-2b=0,求a-b分之a+b
a^2+b^2+4a+5-2b=0
a^2+4a+4+b^2-2b+1=0
(a+2)^2+(b-1)^2=0
所以,a=-2,b=1
(a+b)/(a-b)
=(-2+1)/(-2-1)
=1/3