Question

помогите пожалуйста срочно нужно​

Answer 1

$\left\{\begin{array}{l}x^2-y^2=-21\\x+y=-3\end{array}\right\ \ \left\{\begin{array}{l}(-3-y)^2-y^2=-21\\x=-3-y\end{array}\right\ \ \left\{\begin{array}{l}9+6y+y^2-y^2=-21\\x=-3-y\end{array}\right\\\\\\\left\{\begin{array}{l}6y=-30\\x=-3-y\end{array}\right\ \ \left\{\begin{array}{l}y=-5\\x=2\end{array}\right\ \ \ Otvet:\ \ (\ 2\, ;-5\, )\ .$

Answer 2

Ответ:

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