问题
填空题
已知x2-y2=6,x-y=3,则x=______,y=______.
答案
x2-y2
=(x+y)(x-y)
=6,
∵x-y=3,
∴x+y=2.
则(x+y)+(x-y)=5,
x=2.5,y=-0.5.
故答案为x=2.5,y=-0.5.
已知x2-y2=6,x-y=3,则x=______,y=______.
x2-y2
=(x+y)(x-y)
=6,
∵x-y=3,
∴x+y=2.
则(x+y)+(x-y)=5,
x=2.5,y=-0.5.
故答案为x=2.5,y=-0.5.