Ответ:Корни −5 и −3: x ∈ (−∞; −5] ∪ [−3; +∞).Корни −1 и −1/7: z ∈ (−∞; −1) ∪ (−1/7; +∞).Нули −1/2, 7 и 10: y ∈ (−1/2; 7) ∪ (10; +∞).