Speed is a calculation of distance over time.
So, if we divide our distance, by our time, we will get speed.
So

The speed is 5 meters per second
or 5 m/s (Just a different way of expressing the units)
Answer:
x=+/-3
Step-by-step explanation:
x^4-5x^2-36=0
factor
(x^2-9)(x^2+4)=0
split into 2 equations because one of these terms will need to equal zero for the eqation to be true
x^2-9=0 x^2+4=0
x^2=9 x^2=-4
x=+/-3 no real numbers