(5m十1)的平方减(5m十1)乘(5m-1)
问题描述:
(5m十1)的平方减(5m十1)乘(5m-1)
答
(5m十1)的平方减(5m十1)乘(5m-1)
=(5m+1)(5m+1-5m+1)
=(5m+1)x2
=10m+2
答
(5m+1)²-(5m+1)(5m-1)
=25m²+10m+1-(25m²-1)
=10m+2