x2-y2=48,x+y=6,则x=_,y=_.

问题描述:

x2-y2=48,x+y=6,则x=______,y=______.

∵x2-y2=(x+y)(x-y)=48,x+y=6,
∴x-y=8,
联立

x+y=6
x−y=8

解得
x=7
y=−1