Question

The freight train runs 12miles per hour than a passenger train. It runs 65miles in the same time that the passenger train runs 165miles find the rate of each train. I don't really know the formula using quadratic im sorry

Answer 1

I suspect typos and there is no quadratic involved as it is stated.
v = passenger train speed
(v - 12) = freight train speed

(v-12)t = 65
v t = 165

so
65/(v-12) = 165/v

65 v = 165 v - 1980

100 v = 1980

v = 19.8 mph
v-12 = 7.8

Answer 2

it quadratic word problem.