Find the open intervals on which the function $f(x)=-3x^{2}4x9$ is increasing or decreasing$$

Note$$Use the letter U for union$$To enter $$type the word infinity$$

If the function is never increasing or decreasing$$enter NA in the associated response area$$

increasing$$

decreasing $$

Find the local maximum and minimum values of the function $f(x)=-3x^{2}4x9$

Enter your answers in increasing order$$

$$If there is just one local maximum or minimum value$$then in the second row below enter NA as the answer for$x=$and select NA in the$$There is$$drop$$down menu$$

$$If there are no local maximum or minimum values$$then in both rows below enter NA as the answer for$x=$and NA in the$$there is$$drop$$down menu$$

At $x=$there is $$

At $x=$there is $$