Why doesn't rigidbody2D.AddForce(-5, 2); work?

Assets/Scripts/2DRigid/RigidSwordEnemy.js(54,37): BCE0017: The best overload for the method ‘UnityEngine.Rigidbody2D.AddForce(UnityEngine.Vector2)’ is not compatible with the argument list ‘(int, int)’.

because it only suppports vectors: Unity - Scripting API: Rigidbody2D.AddForce

rigidbody2D.AddForce(Vector2(-5, 2));