Решите неравенство: x^2-5x+6/x+1<=0
X²-5x+6=0 x1+x2=5 U x1*x2=6⇒x1=3 U x2=2 x+1=0⇒x=-1 _ + _ + -------------------------------------------------------------------- -1 2 3 x∈(-∞;-1) U [2;3]