作业帮已知x、y满足x^2+4y^2+2x-4y+2=0,则根号下5x^2+16y^2=
来源：学生作业帮助网 编辑：作业帮 时间：2024/09/29 21:02:11
x){}K+ 74V>۽ŶqF&@¨BפR@ig v>dG)H &H"v6 S9\بB,0Jh 5F`LB%71k14@LMl-m @> D~
已知x、y满足x^2+4y^2+2x-4y+2=0,则根号下5x^2+16y^2=
已知x、y满足x^2+4y^2+2x-4y+2=0,则根号下5x^2+16y^2=
已知x、y满足x^2+4y^2+2x-4y+2=0,则根号下5x^2+16y^2=
x^2+4y^2+2x-4y+2=0
x^2+2x+1+4y^2-4y+1=0
(x+1)^2+(2y+1)^2=0
x=-1 y=-1/2
5x^2+16y^2=5*(-1)^2+16*(-1/2)^2=5+4=9