(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.

问题描述:

(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.