math

Mr. Steve, thank you very much to answer my question on Sunday, 23 August at 1:44 pm. But please, show me how to get :
Number 1 :
1. D = -1
Dx = -2
Dy = -3
Number 2 :
2. D = -5
Dx = -14
Dy = -3

Because the steps to know that is important for me. Please...

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