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NECO Mathematics 2007 Objective — Question 22

Question 22 of 60 from the National Examinations Council (NECO) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

Factorise 4y^2-144.

A. (4y-12)(4y-12)
B. (2y-12)(2y-12)
C. 4(y+6)(y-6)Correct

Explanation

4y^2-144 = 4(y^2-36) = 4(y-6)(y+6).

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