Projectile Trajectory Velocity, with predefined Start and End Positions

Guys and Gals,
I am in serious need of help.
I cannot for the life of me get this to work properly.

If I have:

 public Vector2 GetInitialVelocity(Vector2 A, Vector2 B, float MaxJumpForce, float Gravity)
 {
     float distanceToEnd = Vector2.Distance(A.position, new Vector2(B.x, A.y));
     float TimeStartToPeak = MaxJumpForce / Mathf.Pow(Gravity, 2);
     float TotalTimeInTheAir = TimeStartToPeak * 2;
     float XVelForJump = distanceToEnd / TotalTimeInTheAir;
     return new Vector2(XVelForJump, MaxJumpForce);
 }

It works, if both start and end have the same Y value.
How can I get it to give me the velocity I need to move from A to B, regardless of height?

It won't be something that's updating every frame. I just want to be able to pass the velocity to the rigidbody, and not have to do anything until it hits something again. I'm not handling air resistance or anything.

Any ideas?
I've seen multitudes of math equations and formulas, etc.
But I have genuinely no idea how to convert half the symbols into script, as I don't know what they mean.
They all seem to want the input of a time variable, when I don't care how long it takes.

Thanks in advance everyone.
I'm assuming I'm missing something simple.

• Peace