Решите неравенство х^2(-x^2-100)<100(-x^2-100)

Question

Решите неравенство х^2(-x^2-100)<100(-x^2-100)

Answer 1

(-x²-100)(x²-100)<0<br>(x²+100)(x²-100)>0
(x²+100)(x-10)(x+10)>0
x=10 U x=-10
x∈(-∞;-10) U (10;∞)