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$y(1+3x^3y)=-2x^6$

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#1
RealCielo

RealCielo

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Giải các hệ phương trình sau ( phương pháp đưa về ẩn phụ)

1, $\left\{\begin{matrix} y(1+3x^3y)=-2x^6\\ 1+(10y+1)x^3 = -3(3y^2+y+2).x^6 \end{matrix}\right.$

 

2,$\left\{\begin{matrix} y(x^2+2x+2)=x(y^2+6)\\ (y-1)(x^2+2x+7)=(x+1)(y^2+1) \end{matrix}\right.$

 

3,$\left\{\begin{matrix} (2x-3y)(10-7x-12y)=2\\(5x^2+45y^2-6) (2x-3y)^2=-1 \end{matrix}\right.$


Edited by RealCielo, 29-12-2015 - 15:22.





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