Question

срочно !!!!!!x²-x-2>=0

Answer 1

1. x^2-x-2>0
2. D=1+8=3^2
3. x(1)= (1+3)/2=2    x(2) = (1-3)/2=-1
    x∈(-∞;-1)∪(2;+∞)
Ответ:x∈(-∞;-1)∪(2;+∞)