_______________ / 2 \/ x + 3*x - 18 > 2*x + 3
sqrt(x^2 + 3*x - 18) > 2*x + 3
And(x <= -6, -oo < x)
(x <= -6)∧(-oo < x)
(-oo, -6]
x in Interval(-oo, -6)