已知x+y=6 xy=8求x+2xy+y分之2x-xy+2y的值

网友回答

x+2xy+y分之2x-xy+2y
=[2(x+y)-xy]/[(x+y)+2xy]
=(12-8)/(6+16)
=4/22=2/11======以下答案可供参考======
供参考答案1:
X+Y=6，XY=8，X+2XY+Y=6+16=22，2X-XY+2Y=12-8=4，X+2XY+Y分之2X-XY+2y=22/分之4
供参考答案2:
2x-xy+2y / x+2xy+y
=2(x+y)-xy / (x+y)+2xy
=2*6-8 / 6+2*8
=2/11