Aboat goes 4 miles upstream in four hours. it returns downstream to the starting point in two hours .the rate of the boat is x. the rate of the river current is y . find x & y miles per hour

here

step-by-step explanation:

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i