1.(3x-2)^3-[2(2(x+1)]^3
2.a) (x+1)^2-(x-1)^2
2b) Hence by using (a) without using a calculator, factorize and evalute 2001^2-1999^2
3. 4x+5-12x^2
4.15x^2+22xy-56y^2
5. 250x^3+16y^3
6. x^2-x-2
收錄日期: 2021-04-15 18:18:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080929000051KK01849