给出三个多项式1/2x^2+2x-1,1/2x^2+4x+1,1/2x^2-2x请选择你最喜欢的两个多项式进行加法运算把结果因式分

(1/2x^2+2x-1)+(1/2x^2+4x+1)
=x^2+6x
=x(x+6)
(1/2x^2+4x+1)+(1/2x^2-2x)
=x^2+2x+1
=(x+1)^2
(1/2x^2+2x-1)+(1/2x^2-2x)
=x^2-1
=(x+1)(x-1)