Enter 3 points to form the quadratic equation. Parabolas have two equation forms standard and vertex. For example 5 a12 b1 c simplifies to a -b - c 5.
You can solve a quadratic equations using the quadratic formula or factoring.
So we want two numbers that multiply together to make 6 and add up to 7. X 02 or x 1. The quadratic form to use is the x-intercepts form which is as you can see in this image. If you are unaware of how to solve a quadratic equation I suggest you make yourself aware with the quadratic formula and also how to use it.