If the distance between the points (4, p) and (1, 0) is 5, then the value of p…

2019

If the distance between the points (4, p) and (1, 0) is 5, then the value of p is:

  1. A.

    4

  2. B.

    0

  3. C.

    ±4

  4. D.

    −4

Attempted by 118 students.

Show answer & explanation

Correct answer: C

Solution:

Use the distance formula between (4, p) and (1, 0):

sqrt((4 - 1)^2 + (p - 0)^2) = 5

Square both sides to remove the square root:

  1. (4 - 1)^2 + p^2 = 25

  2. 9 + p^2 = 25

  3. p^2 = 16

  4. p = ±4

Therefore the values of p are 4 and -4.

Quick check:

  • For p = 4: distance = sqrt(9 + 16) = 5.

  • For p = -4: distance = sqrt(9 + 16) = 5.

A video solution is available for this question — log in and enroll to watch it.

Explore the full course: Rssb Senior Computer Instructor