(a²+2a-1)-(b^4-2b²-1)=0是怎么化简到：（a+b2）（a-b2+2）=0求详细点的.

(a²+2a-1)-(b^4-2b²-1)=0是怎么化简到：（a+b2）（a-b2+2）=0求详细点的.
(a²+2a-1)-(b^4-2b²-1)=0是怎么化简到：（a+b2）（a-b2+2）=0
求详细点的.

(a²+2a-1)-(b^4-2b²-1)=0是怎么化简到：（a+b2）（a-b2+2）=0求详细点的.
(a²+2a-1)-(b^4-2b²-1)=0
a²+2a-1-b^4+2b²+1=0
a²-b^4+2a+2b²=0
(a-b^2)(a+b^2)+2(a+b^2)=0
（a+b^2)(a-b^2+2）=0