方程组 (x+y)²-6(x+y)+8=0 3x²-2xy-y²=0 5/(2x+1)+2
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方程组 (x+y)²-6(x+y)+8=0 3x²-2xy-y²=0 5/(2x+1)+2/(3y-4)=3 3/(2x+1)+1/(4-3y)=-6/5
![方程组 (x+y)²-6(x+y)+8=0 3x²-2xy-y²=0 5/(2x+1)+2](/uploads/image/z/7433240-32-0.jpg?t=%E6%96%B9%E7%A8%8B%E7%BB%84+%EF%BC%88x%2By%29%26%23178%3B-6%28x%2By%29%2B8%3D0+3x%26%23178%3B-2xy-y%26%23178%3B%3D0+5%2F%282x%2B1%29%2B2)
方程组 (x+y)²-6(x+y)+8=0
[(x+y)-2][(x+y)-4]=0;
x+y=2或x+y=4;
3x²-2xy-y²=0
(3x+y)(x-y)=0;
3x+y=0或x-y=0;
y=-3x或y=x;
∴x=-1,y=3或x=1,y=1或x=-2,y=6或x=2,y=2;
5/(2x+1)+2/(3y-4)=3(1)
3/(2x+1)+1/(4-3y)=-6/5(2)
(1)+(2)×2得:
11/(2x+1)=3-12/5=3/5;
6x+3=55;
6x=48;
x=8;
5/(16+1)+2/(3y-4)=3;
2/(3y-4)=3-5/17;
2/(3y-4)=46/17;
3×46y-4×46=34;
138y=218;
y=109/69;
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[(x+y)-2][(x+y)-4]=0;
x+y=2或x+y=4;
3x²-2xy-y²=0
(3x+y)(x-y)=0;
3x+y=0或x-y=0;
y=-3x或y=x;
∴x=-1,y=3或x=1,y=1或x=-2,y=6或x=2,y=2;
5/(2x+1)+2/(3y-4)=3(1)
3/(2x+1)+1/(4-3y)=-6/5(2)
(1)+(2)×2得:
11/(2x+1)=3-12/5=3/5;
6x+3=55;
6x=48;
x=8;
5/(16+1)+2/(3y-4)=3;
2/(3y-4)=3-5/17;
2/(3y-4)=46/17;
3×46y-4×46=34;
138y=218;
y=109/69;
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,
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