1,-8xy÷5x/2y

问题描述:

1,-8xy÷5x/2y
2,y+2/y的平方-6y+6除(3-y)
3,-8x平方y四次方乘4y六次方/3x除(-6z/x平方y)
4,4-b平方/a平方-6a+9除2+b/3-a乘3a-9/a平方

(1)-8xy÷5x/2y
=-8xy*2y/5x
=-1.6y*2y
=-3.2y^2
(2)y+(2/y)^2-6y+6/(3-y)
=(12+2y)/(3y-y^2)-5y