NECO Mathematics 2007 Objective — Question 30
Question 30 of 60 from the National Examinations Council (NECO) Mathematics 2007 Objective paper, with the correct answer and a full explanation.
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What must be added to y^2-7y to make the expression a perfect square?
- A. -49/4
- B. -7/2
- C. 7/2
Explanation
Completing the square requires adding (7/2)^2 = 49/4.
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