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JSCE Mathematics 2022 Objective — Question 3

Question 3 of 80 from the Junior Secondary Certificate Examination (JSCE) Mathematics 2022 Objective paper, with the correct answer and a full explanation.

Factorise: 9r² - 1

A. (3r + 1)(3r - 1)Correct
B. (3r + 1)(3r + 1)
C. (3r - 1)(3r - 1)
D. (3r + 1)(1 - 3r)

Explanation

Difference of two squares: (3r)² - 1² = (3r + 1)(3r - 1).

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