=3ab-(2a²-b²+3ab-a²)
=b²-a²
a=1,b=2 代入计算
=4-1=3����һ�£��ղ���� =3ab-(2a²-b²+3ab-a²��=b²-a²a=1��b=2 �������=4-1=3�Բ���3�ǶԵ������ =3ab-(2a²-b²+3ab-a²��=b²-a²a=1��b=2 �������=4-1=3�Ҳ�֪����Ĵ𰸶Բ���3�ǶԵġ��Ե�Ҫ���ҹ�̣�����Ĺ��=3ab-(2a²-b²+3ab-a²��=b²-a²a=1��b=2 �������=4-1=3
3ab-[2a²-(b²-3ab)-a²],其中a=1,b=2
3ab-[2a²-(b²-3ab)-a²],其中a=1,b=2
数学人气:832 ℃时间:2020-02-06 03:02:09
优质解答
我来回答
类似推荐
猜你喜欢
- 1"加速度很大时,物体的速度大小可能不变"这句话对吗?
- 2用简便方法计算49.5*2.84-9.5*2.84
- 3冰河世纪3英文影评 80词
- 4英语:My brother walked to school last Monday.(改为同义句)
- 5制取co2为什么不用碳酸钠粉磨
- 6I enjoy helping others的英语作文快告诉我把,
- 7已知:tana=3,4sin^2a+2sinacosa-cos^2a
- 8滑轮组匀速提升重480N的物体G.所用拉力为200N,将物重提升3m所用时间为10s,不计绳重和摩擦,n为3
- 9英语问题Fully occupied in looking after children,she has no time to enjoy life.
- 10根号下9-4根号5怎么化简,