If x + 1/x = 4, find x^2 + 1/x^2.

A12

B14

C16

D18

Explanation

x^2 + 1/x^2 = (x + 1/x)^2 – 2 = 16 – 2 = 14.

Exam Relevance

Topic: Algebra
Subtopic: Identities

Submitted by: mcqstutor Team More Mathematics MCQs →