Объяснение:
D(y):
{-3x^2+4x+4 >=0
{1-2x>=0
{x(x+5)≠0
{-3(x-2)(x+2/3)>=0
{x=<1/2
{[x≠0
{[x≠-5
{-2/3=<x=<2
D(y): x∈[-2/3;0)∨(0;1/2]