Mai bine (tiparit):
[ equation]
$$
\left\{
\begin{aligned}
(x+y)(x^2+y^2 ) & = 65, \\
(x+y) (x-y)^2 & = 5
\end{aligned}
\right.
$$%
[ /equation]
Care se compileaza asa:
Verificare cu calculatorul:
sage: eq1 = (x+y) * (x^2+y^2 ) == 65
sage: eq2 = (x+y) * (x-y)^2 == 5
sage: solve( [ eq1, eq2 ], x,y )
[[x == 3, y == 2], [x == 2, y == 3]]
Access general
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