填空:B/a+3=()/a(a+3)*M-2n/m平方-2mn=1/()

问题描述:

填空:B/a+3=()/a(a+3)*M-2n/m平方-2mn=1/()

b/a+3=(ab)/a(a+3)
(m-2n)/m(m-2n=1/(m)是一道题,中间是乘号