-19 ≥ 0
(x+5)² - 6
(x+5)² - 6 <0<br>x²+10x+25-6 <0<br>x²+10х+19 <0<br>Парабола, ветви вверх.
x²+10x+19=0
D=100-4*19=100-76=24
x₁=-10-√24 = -10 -2√6 =-5-√6
2 2
x₂=-5+√6
+ - +
------------ -5-√6 ---------------- -5+√6 ---------------
\\\\\\\\\\\\\\\\\\\
x∈(-5-√6; -5+√6)