JAMB Mathematics 2021 Objective — Question 22

Question 22 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2021 Objective paper, with the correct answer and a full explanation.

22. Solve the equation y - 11√y = -24 (a) 3,8 (b) 9, -8 (c) 64,9 (d) 4,7

A. 3,8
B. 9, -8
C. 64,9Correct
D. 4,7

Explanation

Rearranging: y + 24 = 11√y. Squaring both sides: y² + 48y + 576 = 121y, so y² - 73y + 576 = 0, which factorises to (y-9)(y-64) = 0. So y = 9 or 64.

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