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Wzór na środek odcinka:
S = (xA+xB/2 , yA+yB/2)
-1 = (3-2√7) + xB/2 / *2
-2 = (3 - 2√7) + xB
-2 = 3 - 2√7 + xB
-2 - 3 + 2√7 = xB
-5 + 2√7 = xB
7 = √3 + yB/2 /*2
14 = √3 + yB
14 - √3 = yB
Współrzędne punktu B = (-5+2√7 , 14-√3)