That’s okay man, I feel you. Last year during my math final I used methods and formulas completely different than the ones that were taught to me and my teacher was blown away, however gave me full credit as i consistency got the answers. Do things the way they are easiest to you!!
use this as a example. x^2-4 x^2 square root is x 4 square root is 2 now your equation should look a little like: x-2 but you originally got the negative 2 from a positive and a negative 2 multiplying together. which means your equation should now look like (x+2)(x-2) does that make a little more sense?
Jesus Christ is coming soon, God is telling y'all to repent from your sins and live a life for him so you wont get left behind when he comes back and take his people.