已知x-3√(xy)-4y=0则(2x+3√(xy)-2y)/(3x-√(xy)+y)=?答案是14/15 ∵x-3√(xy)-4y=0∴(√x-2√y)(√x+√y)=0化错的吧``

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/08 18:51:10

已知x-3√(xy)-4y=0则(2x+3√(xy)-2y)/(3x-√(xy)+y)=?答案是14/15 ∵x-3√(xy)-4y=0∴(√x-2√y)(√x+√y)=0化错的吧``
已知x-3√(xy)-4y=0
则(2x+3√(xy)-2y)/(3x-√(xy)+y)=?
答案是14/15
∵x-3√(xy)-4y=0
∴(√x-2√y)(√x+√y)=0
化错的吧``

已知x-3√(xy)-4y=0则(2x+3√(xy)-2y)/(3x-√(xy)+y)=?答案是14/15 ∵x-3√(xy)-4y=0∴(√x-2√y)(√x+√y)=0化错的吧``
∵x-3√(xy)-4y=0
∴(√x-4√y)(√x+√y)=0
∵x,y不能都等于0
∴√x=4√y
∴x=16y
∴(2x+3√(xy)-2y)/(3x-√(xy)+y)
=(32y+12y-2y)/(48y-4y+y)
=14/15
sorry!

写得清楚点嘛