Решите неравенство: 2x^2-13x+1>=(x-3)^2

Question

Решите неравенство: 2x^2-13x+1>=(x-3)^2

Answer 1

2x^2-13x+1>=x^2+9-6x
x^2-7x-8>=0
(x+1)(x-8)>=0
x<=-1, x>=8