Answer: B
Step-by-step explanation:
There is 3 on both sides and all of the choices offered have x to the 2nd power, so that means you'll have to square root 9 to get -3 and 3 as the endpoints.
Take the square root of both sides.
[tex]x^2 \leq 9\\-3 \leq x \leq 3[/tex]
This is a good way to check.
