Pls help me with this math.

Find the roots of the equation below. x^2 - 6 + 9 = 0

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52