\begin{cases}y(x^2+2x+2)=x(y^2+6)\\ (y-1)(x^2+2x+7)= (x+1)(y^2+1)\end{cases} 
thank a mon –  vulinh491999 17-06-15 09:57 PM
đặt x 1=a đc hệ đối xứng loại 2 –  dolaemon 17-06-15 09:07 PM
vag...... –  vulinh491999 16-06-15 05:02 PM
vào khung chát đi, ank noi tiep –  Ruanyu Jian 16-06-15 05:01 PM
sao anh viet co dau cong ma sao lai thanh the nay nhi? –  Ruanyu Jian 16-06-15 05:01 PM
<=> -xy^ (x^2 2x 2)y - 6x = 0 –  Ruanyu Jian 16-06-15 05:00 PM
a nói tiếp đi ạ –  vulinh491999 16-06-15 05:00 PM
cái thứ nhât <=> (x^2 2x 2) y = xy^2 6x –  Ruanyu Jian 16-06-15 04:59 PM
vâng .... –  vulinh491999 16-06-15 04:58 PM
vay thi ank bat dau nha –  Ruanyu Jian 16-06-15 04:55 PM
????????? –  Ruanyu Jian 16-06-15 04:55 PM
anh giải đi –  vulinh491999 16-06-15 04:54 PM
giải hệ học từ c2 r ạ –  vulinh491999 16-06-15 04:53 PM
em mun xem ank giai hay la xem may tinh giai –  Ruanyu Jian 16-06-15 04:53 PM
,a e moi lop 10 da hoc giai he rui ak? –  Ruanyu Jian 16-06-15 04:52 PM
đáp án đúng r a –  vulinh491999 16-06-15 04:52 PM
sao e k thu lai bao ank –  Ruanyu Jian 16-06-15 04:51 PM
????.... –  Ruanyu Jian 16-06-15 04:50 PM
anh thử lại đi –  vulinh491999 16-06-15 04:50 PM
nhung dung dap an k nhi? –  Ruanyu Jian 16-06-15 04:49 PM
anh nói cách làm đi –  vulinh491999 16-06-15 04:48 PM
x=1 and y=2: x=1 and y=3; x=2 and y=2: x=2 and y=3 –  Ruanyu Jian 16-06-15 03:00 PM
PT1.(y-1)-PT2.y: $(y-3)(y-2)(x+y)=0$ 
ok xong naha 

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