Find the value of x such that where the coordinates of P, Q and R are (6,-1), (1, 3) and (x, 8) respectively.

Question

Philoid · Accepted Answer

Coordinates are P(6,-1), Q(1, 3) and R(x, 8)

Using distance formula =

⇒ PQ = QR

On squaring both sides, we get

=

On solving above equation, we get

Therefore x = -3, 5