1.x^2-6x-2y+11=02x-y+1=02.x^2-xy-2y=07x^2-y^2-x-1=03.x^2-2y^2-y=12x^2-4y^2+x=6最好有过程,注意是方程组!
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1.x^2-6x-2y+11=02x-y+1=02.x^2-xy-2y=07x^2-y^2-x-1=03.x^2-2y^2-y=12x^2-4y^2+x=6最好有过程,注意是方程组!1.x^2-6x-
1.x^2-6x-2y+11=02x-y+1=02.x^2-xy-2y=07x^2-y^2-x-1=03.x^2-2y^2-y=12x^2-4y^2+x=6最好有过程,注意是方程组!
1.x^2-6x-2y+11=0
2x-y+1=0
2.x^2-xy-2y=0
7x^2-y^2-x-1=0
3.x^2-2y^2-y=1
2x^2-4y^2+x=6
最好有过程,注意是方程组!
1.x^2-6x-2y+11=02x-y+1=02.x^2-xy-2y=07x^2-y^2-x-1=03.x^2-2y^2-y=12x^2-4y^2+x=6最好有过程,注意是方程组!
1.x^2-6x-2y+11=0
2x-y+1=0
解方程组得：
[x,y]= solve('x^2-6*x-2*y+11=0','2*x-y+1=0 ')
x =
9
1
y =
19
3
2.x^2-xy-2y=0
7x^2-y^2-x-1=0
[x,y]= solve('x^2-x*y-2*y=0 ','7*x^2-y^2-x-1=0 ')
x =
-7/4+1/4*33^(1/2)
-7/4-1/4*33^(1/2)
-1/2+1/6*33^(1/2)
-1/2-1/6*33^(1/2)
y =
-17/4+3/4*33^(1/2)
-17/4-3/4*33^(1/2)
2-1/3*33^(1/2)
2+1/3*33^(1/2)
3.x^2-2y^2-y=1
2x^2-4y^2+x=6
解方程组得：
[x,y]= solve('x^2-2*y^2-y=1','2*x^2-4*y^2+x=6 ')
x =
2
-11
y =
1
15/2
我用计算机算的
答案绝对保证正确
过程麻烦一点
自己对照答案.
好好计算一下：
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
1.(x-2y)(x+2y)-(x平方+y)(x平方-y) 2.(2x-y)(y+2x)-(2y+x)(2y-x)3.已知：x+y=6,x平方-y平方=48,求x,y的值4.x平方-2x分之x+2 -- x平方-4x+4分之x-1
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
[(2x-y)(2x+y)+y(y-6x)]÷2x=?
（x+y）/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6