_______ \/ x + 3 <= 1 - x
sqrt(x + 3) <= 1 - x
/ ____\ | 3 \/ 17 | And|-3 <= x, x <= - - ------| \ 2 2 /
(-3 <= x)∧(x <= 3/2 - sqrt(17)/2)
____ 3 \/ 17 [-3, - - ------] 2 2
x in Interval(-3, 3/2 - sqrt(17)/2)