Question

when is qvadratik use in real live

Answer 1

I assume you mean quadratic?

Answer 2

yes my english is not nativ

Answer 3

We use it to study the motion of an object

Answer 4

missiles and other projectiles under the influence of gravity will follow a parabolic trajectory.

Answer 5

For example
x(t)= x0+vt+1/2 a t^2

Answer 6

describing the path of a ball, an object falling from a height...

Answer 7

oh thanks to you all for your advices