Question

Помогите решить ,пожалуйста

Answer 1

$1)y= sqrt{x+8} \ x+8 geq 0 \ x geq -8 \ xin[-8;+ infty) \ \ 2) sqrt{5-2x} \ 5-2x geq 0 \ -2x geq -5 \ 2x leq 5 \ x leq 2.5 \ xin(- infty ;2.5]$

$4)3y ^{2} +8y-3 textless 0 \ D=64+36=100 \ sqrt{D} =10 \ y_{1} = frac{-8+10}{6} = frac{2}{6} = frac{1}{3} \ y _{2} = frac{-8-10}{6} =- frac{18}{6} =-3 \ \ yin(-3; frac{1}{3} )$