The distance between the two points (a + b, c – d) and (a – b, c + d) is

Let us show that the points (2, –2), (8, 4), (5, 7) and (–1, 1) are the vertices of a rectangle.

Let us show that the points (2, 5), (5, 9), (9, 12) and (6, 8) form a rhombus when they are joined orderly.

If the distance between the two points (x, –7) and (3, –3) is 5 units, then the values of x are

If the distance of the point (x, 4) from the origin is 5 units, then the values of x are