二元二次方程组xy+x+y=11 x^2y+xy^2=30
二元二次方程组xy+x+y=11 x^2y+xy^2=30
xy+x+y=11
x^2y+xy^2=30
xy+x+y=11
x^2y+xy^2=30
数学人气:448 ℃时间:2019-09-22 10:21:34
优质解答
xy+x+y=11 x^2y+xy^2=30 xy(x+y)=30xy,x+y为方程x^2-11x+30=0两个根(x-5)(x-6)=0xy=5,x+y=6或xy=6,x+y=51)xy=5,x+y=6x,y是方程x^2-6x+5=0两个根x=1,y=5或x=5,y=12)xy=6,x+y=5x,y是方程x^2-5x+6=0两个根x=2,y=3或x=3,...
我来回答
类似推荐
猜你喜欢
- 1把下列词组改成过去式
- 2She is _______(致力于) to caring for the sick and needy in her spare time.
- 3检验硫酸根离子除了用氯化钡为什么还要用稀盐酸而不是稀硫酸或者稀硝酸?
- 4请问,形似“3”的音标发音是不是和汉语拼音中的“r”相同?
- 5帮忙区分一下marry married marry with marry to和get married
- 6I know you are arrving next Sunday
- 7物理题在水平桌面上向右运动的物体所受重力为200N,物体和水平桌面之间的动摩擦因数u=0.1,在运动过程中,
- 8-Is this your room?-No,it's___room.A.the children B the children's C.two week time D.two weeks time
- 9解方程组 x-y=(√2-1)平方 x=√2y
- 10英语翻译