a^3b-ab^3
=ab(a^2-b^2)
=ab(a+b)(a-b)
猜你喜欢
- 1急求一篇关于机器人的英语作文!
- 2从卫生健康的角度对如和正确选择饮用水（自来水矿泉水纯净水蒸馏水等）提出自己的看法或建议
- 3在等差数列{an}中，a3，a8是方程x2-3x-5=0的两个根，则S10是（ ） A.15 B.30 C.50 D.15+1229
- 4甲、乙两车先后以相同的速度从A站开出,8点整甲车距A站的距离是乙车距A站距离的三倍,8点十分甲车距A站的距离是乙车距A站距离的2倍.问:甲车是何时从A站出发的?
- 5根据句意用括号中所给单词的适当形式填空Does your father like_ [play] sports every day
- 6是it's surprise that还是it is a surprise that 正确?
- 7ABC同时掷骰子,谁大谁胜,求掷第一次,A得五胜的概率.掷第一次A胜的概率
- 8已知A={y|y=x²+2mx+4,x∈R},B={x|(log3x)²+log1/3x≤0},且A∩B≠￠,求实数m的取值范围
- 9high school; junior school; secondary school; senior school 之间的区别?
- 10The next time you 空 one,thinking that for centuries only great men and women used them,you'll feel you are important peo