Hi, I'm trying to find the solution to but i can't for the life of me figure out how to do it, it's the square root that has me stumped. I've managed to get it into a form of and found the roots of approximately 5.5 and -6.5 which i then substituted into the y=mx+c form equations but still couldnt get the right answer of 4,2.

So I've returned again seeking help, anyone care to take a stab?