negative x value in Vector2

So I've been trying my hand at some game dev, and I've been trying to implement a simple pong game, but it seems setting the balls starting velocity to a negative value on the X plane still makes it into a positive force.

I ran into this first with rigidbody2D.AddForce(v2) where v2 is a Vector2 with a -x value, and with setting setting the rigidbody2D.velocity directly, but the force is always positive.

On the flip side of the issue, a negative y works perfectly fine, any ideas as to whats going on?

 rigidbody2D = GetComponent<Rigidbody2D>();
 Vector2 v2 = new Vector2(-10, 0);
 rigidbody2D.AddForce(v2);

that's the misbehaving code, any reason why positive force is being applied in the x axis?