设x,y是有理数,且x,y满足等式x^2+2y+√2y=17-4√2,求x,y的值

问题描述:

设x,y是有理数,且x,y满足等式x^2+2y+√2y=17-4√2,求x,y的值

√2y=-4√2
y=-4
x^2+2y=17
x^2=25
x=5,-5