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Jamb 1990 Mathematics Past QuestionsQuestion 16:If a2 + b2 = 16 and 2ab = 7.Find all the possible values of (a - b) A. 3, -3 B. 2, -2 C. 1, -1 D. 3, -1 Question 17:Divide x3 - 2x2 - 5x + 6 by (x - 1) A. X2 - x - 6 B. X2 - 5x + 6 C. X2 - 7x + 6 D. X2 - 5x - 6 Question 18:If x + \(\frac{1}{x}\) = 4, find x2 + \(\frac{1}{x^2}\) A. 16 B. 14 C. 12 D. 9 Question 19:What must be added to 4x2 - 4 to make it a perfect square? A. \(\frac{-1}{x^2}\) B. \(\frac{1}{x^2}\) C. 1 D. -1 Question 20:Find the solution of the equation x - 8\(\sqrt{x}\) + 15 = 0 A. 3, 5 B. -3, -5 C. 9, 25 D. -9, 25 |
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