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Post-UTME Mathematics 2013 Objective — Question 71

Question 71 of 100 from the Post-UTME Screening (Post-UTME) Mathematics 2013 Objective paper, with the correct answer and a full explanation.

Simplify (4-x²)(2+x)^(-½)

A. (2+x)√(2-x)
B. (2-x)√(2+x)Correct
C. (2-x)√(2-x)
D. (2+x)/√(2-x)

Explanation

4-x²=(2-x)(2+x). Dividing by (2+x)^(1/2) leaves (2-x)(2+x)^(1/2) = (2-x)√(2+x).

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