Hello, I would need some help with this please:

Airplane A and airplane B move along vertical paths. At some point, from the penetration of their pathways, airplane A is 2300 km away and aircraft B 2000 km.

Specify the minimum distance of both airplanes if the airplane A is flying 950km/h and the airplane is flying 850km/h.

So, I get that plane A is at A[0,-2300] and plane B is at B[-2000,0] at some point.

I know how to find global minimum but I don't know how to make the quadratic equation from these parameters.

Can you please help me? Thank you very much

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