初一數學因式分解,要完整過程6請詳細解答,謝謝!(10 15:55:3) a4b4-c4

初一數學因式分解,要完整過程6請詳細解答,謝謝!(10 15:55:3) a4b4-c4


a4b4-c4
=(ab)4-c4
=[(ab)²;]²;-(c²;)²;
=[(ab)²;-c²;][(ab)²;+c²;]
=(ab+c)(ab-c)[(ab)²;+c²;]