若x+y=6,x2-y2=48,则x-y=_____

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若x+y=6,x2-y2=48,则x-y=_____
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若x+y=6,x2-y2=48,则x-y=_____
若x+y=6,x2-y2=48,则x-y=_____

若x+y=6,x2-y2=48,则x-y=_____
x*x-y*y=
(x+y)(x-y)=48
x-y=48/6=8

x-y=(x-y)(x+y)/(x+y)=(x^2-y^2)/(x+y)=48/6=8

x2-y2除以x+y=6得8

X=15
y=-9

24

若x+y=6,x2-y2=48,则x-y=___8__
1楼的画蛇添足,答非所问,脑残,鉴定完毕!

x+y=6 x-y=8

24

X平方-Y平方=(X+Y)(X-Y)=48
(X+Y)=6,所以,(X-Y)=48/6=8

X-Y=24