1)分式3a/2x^2y,4b/-5xz^2,-5x/4z^3y^2的最简公分母是_________.

问题描述:

1)分式3a/2x^2y,4b/-5xz^2,-5x/4z^3y^2的最简公分母是_________.
2)分式方程1/(2x+y)+3/(2-4x)=(3x-1)/(4x^2-1)去分母后所华为的整式方程是:_____________________.
3)若a、b互为相反数,c、d互为倒数,绝对值M=3,则(a+b)/(a+b+5)+cd-M^2等于_________.

1.60abc
2.12x^3-4x^2-3/8x+3/1-y
3.-8