Question

х(в квадрате)-3х+2>=0

Answer 1

$x^2-3x+2 geq 0 \ x^2-3x+2 = 0 \ D=9-8=1 \ x_1= frac{3+1}{2} =2 \ x_1= frac{3-1}{2} =1 \ xin(-infty; 1]cup[2; +infty)$