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JAMB Mathematics 2007 Objective — Question 16

Question 16 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

The solution set of the quadratic inequality x^2+x-12 >= 0 is

A. x<=3 or x<=-4
B. x>=3 or x<=-4Correct
C. x>=3 or x<=4
D. x>=3 or x>=-4

Explanation

x^2+x-12=(x-3)(x+4)>=0, giving x>=3 or x<=-4.

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