因式分解:(y的平分+2y)的平分+2(y的平分+2y)+1

问题描述:

因式分解:(y的平分+2y)的平分+2(y的平分+2y)+1

(y^2+2y)^2+2(y^2+2y)+1
=(y^2+2y+1)^2
=(y+1)^4