Решите систему неравенств, плиз))
Вот:
[tex]\left \{ {{\left \{ {{x+y\leq1} \atop {x+y\geq-1}} \right.} \atop {\left \{ {{y+x+xy\leq1} \atop {x+y+xy\geq-1}} \right.}} \right.[/tex]
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