Question

Решите неравенство √3х+7≥х+1
Помогите.

Answer 1

{3x+7≥0⇒3x≥-7⇒x≥-7/3
{3x+7≥x²+2x+1
x²-x-6≤0
x1+x2=1 U x1*x2=-6⇒x1=-2 U x2=3
-2≤x≤≤3
x∈[-2;3]