If x – 1/x = 3, find x^2 + 1/x^2.

A7

B9

C11

D13

Explanation

x^2 + 1/x^2 = (x – 1/x)^2 + 2 = 3^2 + 2 = 11.

Exam Relevance

Topic: Algebra
Subtopic: Identities

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