Решите неравенства (0,5)x2-2 > 1/4

Question

Решите неравенства (0,5)x2-2 > 1/4

Answer 1

1/2*x^2>1/4+2, 1/2*x^2>9/4, x^2>9/4*2, x^2>9/2, -(3/sqrt(2))<x<(3/sqrt(2))