Jamb Mathematics Past Questions For Year 1990
Question 11
If \(a^2+ b^2= 16\) and 2ab = 7.Find all the possible values of (a - b)
- A. 3, -3
- B. 2, -2
- C. 1, -1
- D. 3, -1
Question 12
Divide \(x^3 - 2x^2 - 5x + 6\) by (x - 1)
- A. \(x^2\) - x - 6
- B. \(x^2\) - 5x + 6
- C. \(x^2\) - 7x + 6
- D. \(x^2\) - 5x - 6
Question 13
If x + \(\frac{1}{x}\) = 4, find \(x^2+ \frac{1}{x^2}\)
- A. 16
- B. 14
- C. 12
- D. 9
Question 14
What must be added to 4x\(^2\)- 4 to make it a perfect square?
- A. \(\frac{-1}{x^2}\)
- B. \(\frac{1}{x^2}\)
- C. 1
- D. -1
Question 15
Find the solution of the equation x - 8\(\sqrt{x}\) + 15 = 0
- A. 3, 5
- B. -3, -5
- C. 9, 25
- D. -9, 25
