解
(2y+1)²(2y+1)³+(2y+1)^4×[-(2y+1)]
=(2y+1)^5-(2y+1)^5
=0有详细步骤吗？这个就是步骤了.差不多就这样∵(2y+1)²(2y+1)³+(2y+1)^4×[-(2y+1)]=(2y+1)^(2+3)-(2y+1)^4×(2y+1)=(2y+1)^5-(2y+1)^5=0