Solve for x: log_2(x + 3) + log_2(x – 3) = 4.

A5

B6

C7

D8

Explanation

log_2[(x + 3)(x – 3)] = 4 => x^2 – 9 = 2^4 = 16 => x^2 = 25 => x = 5 (since log requires x > 3).

Exam Relevance

Topic: Algebra
Subtopic: Logarithms

Submitted by: mcqstutor Team More Mathematics MCQs →