Ready solution of the problem. The sorcerer of Arutyunov. Task number 21.
21 - 30. Solve the following tasks
21. Equation of one of the sides of the square x + 3y - 5 = 0. Write the equations of the other three sides of the square if P (-1, 0) is the point of intersection of its diagonals.
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Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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