已知x²+y²+8x+6y+25=0,求x-4y/ - 知识问答

已知x²+y²+8x+6y+25=0,求x-4y/x+y的值

4个回答

x²+y²+8x+6y+25=0
(x+4)²+(y+3)²=0
x+4=0,y+3=0
x=-4,y=-3
x-4y/x+y
=(-4+12)/(-4-3)
=-8/7

相关问题