Not sure how to get the answer at all. I have the quadratic formula but I am not sure how to apply it

Multiply both sides of the equation by -1. You get the following equation:

x^2 - 70x + 600 = 0

Factor the quadratic equation. You get:

(x - 60)(x - 10) = 0

x - 60 = 0

**x = 60**

x - 10 = 0

**x = 10**