GMS 2 How to bounce an object off another at an angle

I want to maintain a similar velocity (slightly decreased) but in the opposite direction, and I want it to bounce at the angle it is relative to the larger object.
I basically just want bombs that bounce off each other in every direction and angle. The picture below shows how I want it to bounce, with the hypotenuse of this triangle representing the angle at which I want the bomb to bounce off the player if it comes close enough.game example.png
 
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