(m^2n^2+1)^2-4m^2n^2

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 23:55:13
(m^2n^2+1)^2-4m^2n^2(m^2n^2+1)^2-4m^2n^2(m^2n^2+1)^2-4m^2n^2(m^2n^2+1)^2-4m^2n^2=(m^2n^2+1+2mn)(m^2n

(m^2n^2+1)^2-4m^2n^2
(m^2n^2+1)^2-4m^2n^2

(m^2n^2+1)^2-4m^2n^2
(m^2n^2+1)^2-4m^2n^2
=(m^2n^2+1+2mn)(m^2n^2+1-2mn)
=(mn+1)^2(mn-1)^2

这是次方吗?