x+y=8,x^2 - y^2=48 ,则y-x=()
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x+y=8,x^2-y^2=48,则y-x=()x+y=8,x^2-y^2=48,则y-x=()x+y=8,x^2-y^2=48,则y-x=()x+y=8x=8-yx^2-y^2=48(8-y)^2-
x+y=8,x^2 - y^2=48 ,则y-x=()
x+y=8,x^2 - y^2=48 ,则y-x=()
x+y=8,x^2 - y^2=48 ,则y-x=()
x+y=8
x=8-y
x^2 - y^2=48
(8-y)^2-y^2=48
64-16y=48
y=1
x=7
所以Y-X=-6
x^2-y^2=(x+y)(x-y)=8(x-y)=48
x-y=6,y-x=-6
6
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12y(x-y)^2-8(x-y)^3=?
(x+y)^2-8(x+y)+48=
(x+y)^2-8(x+y)+48=
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已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=?
x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值
x+y=8,x^2 - y^2=48 ,则y-x=()
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