First, you need to know that the quadratic formula is ax^2 + bx + c = 0
Step 1: Use the quadratic formula with a = 3, b = 7, c = 3
(For the steps I did not know how to explain by typing it so just look at the image to see what to do)
After you follow the steps in the image the answer should be in the second image.
Hope this helps - Alyssa :)