已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/25 10:24:11
![已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1](/uploads/image/z/14905040-32-0.jpg?t=%E5%B7%B2%E7%9F%A5x+y%E6%BB%A1%E8%B6%B3%E7%AD%89%E5%BC%8F2x%2Bx%26%23178%3B%2Bx%26%23178%3By%26%23178%3B%2B2%3D-2xy%2Cx%2By%E5%80%BC%E4%B8%BA+A.-1+B.0+C.2+D.1)
x){}K+*^bk;7ЮPS64ѕPQENvӆ=OvRp5Tp3Pp3Rp3I*ҧv64r+!iUQmgQQ aA*lu
u
d-bN6yv o n9
已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1
已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1
已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1
2x+x²+x²y²+2=-2xy
2x+x²+x²y²+2+2xy=0
(x+1)^2 +(xy+1)^2 =0
x=-1,xy=-1,y=1
x+y=0
B