Question

решите систему неравенств
2x-6≤ 0
x^2+7x+6>0

Answer 1

{2x-6≤ 0⇒2x≤6⇒x≤3
{x^2+7x+6>0 ⇒x<-7 U x>-1
x1+x2=-7 U x1*x2=6⇒x1=-6 U x2=-1
x∈(-∞;-7) U (-1;3]