a^2b-ab^2
=ab(a-b)
把a-b=1,ab=12代入
ab(a-b)
=12
猜你喜欢
- 1The village students have to cross the bridge ________ the river to their school
- 2一个直角梯形的周长是72厘米,两底之和是两腰之和的3倍,其中一条腰为10厘米,则这个直角梯形的面积是多少?
- 3简述劳动定额的概念、表现形式及其作用?
- 4为什么unusual前用a而useful前用an
- 5红外线与红色的光有关系吗
- 6Please look after( )when I am nat at home,怎么填,24小时内有效!给10.
- 7Rt△ABC中,∠ACB=90,CD是斜边AB上的高,DE⊥AC,DF⊥BC 求证:BC三次方/AC三次方=BF/AE 求证:
- 8画出下列函数图象,并说明y随x的变化情况.
- 9根据首字母以及句意补全Lisa doesn't (s )her new backpack to us.
- 10《望岳》描写了泰山什么特点?