Решите x²-10x+21<0 и х²-16>0 (X+5)(x-6)(x-17)<0. -(x-2)(9-x) (x+10)>0

Question

Решите x²-10x+21<0 и х²-16>0
(X+5)(x-6)(x-17)<0. -(x-2)(9-x) (x+10)>0

Answer 1

A) (x²-1)(x-2)(x+3)≤ 0
(x-1)(x+1)(x-2)(x+3)≤0

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x∈[-1; 1]∪[1; 2]
Удачи!