m^2-4mn+4n^2=0求(m+n)^2/mn

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 09:33:28
m^2-4mn+4n^2=0求(m+n)^2/mnm^2-4mn+4n^2=0求(m+n)^2/mnm^2-4mn+4n^2=0求(m+n)^2/mnm^2-4mn+n^2=0即m^2+n^2=4mn

m^2-4mn+4n^2=0求(m+n)^2/mn
m^2-4mn+4n^2=0求(m+n)^2/mn

m^2-4mn+4n^2=0求(m+n)^2/mn
m^2-4mn+n^2=0

m^2+n^2=4mn

(m+n)^2/mn
=(m^2+n^2+2mn)/mn
=(4mn+2mn)/mn
=6mn/mn
=6

(m-2n)^2=0 m=2n
(m+n)^2)/mn=9n^2/2n^2=9/2

(1) 由方程解得: m=2n
(2) 故(m+n)^2=9n^2 ; mn=2n^2
(3) 原式=9/2