-9√ [ 2x + 1] > -18
Divide both sides by -9......since we are dividing an inequality by a negative, we need to reverse the inequality sign.....so....we have
√[2x + 1 ] < 2 square both sides
2x + 1 < 4 subtract 1 from both sides
2x < 3 divide both sides by 2
x < 3/2
But also remember that the result of the expression ubder the radical must be ≥ 0
So
2x + 1 ≥ 0
2x ≥ -1
x ≥ -1/2
So.....the solution is
-1/2 ≤ x < 3/2
We wll have a "closed" circle on the left side and an "open" circle on the right - so......the last choice
Does this make sense, Jenny ????