Röyskope

Verified answer

1) 2x+11≥0; x∈[-5.5; +∞)

2) 17-15x-2x²≥0;
2x²+15x-17≤0
D=15²-4*2*(-17)=361
√D=19
x1=(-15+19)/2*2=1
x2=(-15-19)/2*2=-8.5
x∈[-8.5;1]

(1) и (2): 
x∈[-5.5;1]