a^2+b^2
=a^2+b^2+2ab-2ab
=(a+b)^2-2ab
=49+20
=69
不懂的欢迎追问,
已知a+b=7,ab=-10,a>b,求a2+b2的值
已知a+b=7,ab=-10,a>b,求a2+b2的值
数学人气：134 ℃时间：2020-01-29 04:30:02
优质解答
我来回答
类似推荐
猜你喜欢
- 1"l'll wait for you until you find the happiness belong to you then I will give up
- 2tanx=2,tan(x-y)=-3/5,则tany=?
- 3此题为八年级的一道物理题.
- 4y=x分之1的图像怎么画
- 5心急如焚的造句
- 6any other student 和 other student有什么区别?
- 7though the workers are tired ,they don't want to ( ).A.working B to work
- 8每个油桶最多装油1.5千克.要装60千克油,需要多少个这样的油桶?
- 923、 Don’t be afraid of ______ mistake when you learn to speak English,.
- 10如何鉴别碳酸钠,硅酸钠,硫酸钠,亚硫酸钠