已知(x+y)(x+y-10)+25=0,且x-y=2,求x,y的值?
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已知(x+y)(x+y-10)+25=0,且x-y=2,求x,y的值?
已知(x+y)(x+y-10)+25=0,且x-y=2,求x,y的值?
已知(x+y)(x+y-10)+25=0,且x-y=2,求x,y的值?
(x+y)(x+y-10)+25=0,
(x+y)²-10(x+y)+25=0
(x+y-5)²=0
x+y-5=0
x+y=5
∵x-y=2
∴x=3.5,y=1.5
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(x+y)(x+y-10)+25=0,且x-y=3,求x,y
(x+y)(x+y-10)+25=0,且x-y=3,求x,y
已知x+y=2,则(x+y)^2-10x-10y+25=___.
已知x+y=2,则(x+y)2次方-10x-10y+25=