=(x+y)²-[4(x-y)]²
=(x+y+4x-4y)(x+y-4x+4y)
=(5x-3y)(5y-3x)
猜你喜欢
- 1修改病句 Why does a UFO work?
- 2关于 What would you do if you had a million dollars
- 3我再向外看时,他已抱了朱红的橘子往回走了.过铁道时,他先把橘子散放在地上,自己慢慢爬下,再抱起橘子走.近几年来,父亲和我都是东奔西走,家中光景是一日不如一日.
- 4质量相同的木块和铁块放入水中,静止后受到浮力大的是?为什么?
- 5急急急急急 一个长方体的长是12CM,宽是5CM,体积是360CM3.这个长方体的表面积是多少?
- 6一条路全长30千米,分上坡,平坡和下坡三段,各段路程长的比是1:2:3,某人走各段路程所用时间比是4:5:6
- 7may,may be,maybe,probably,possible,might等表可能的区别以及用法
- 8___he couldn’t understand was ___,as a teacher of Chinese ,he was asked to teach English.
- 9求翻译英文的一句话 I would rather that moment could be ever
- 10找两篇寓意一样的语言故事 要写出寓意 伊索寓言都行 但寓意一定要一样 寓意要写出来