ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 256:

• JAMB 1990

If x + \(\frac{1}{x}\) = 4, find x² + \(\frac{1}{x^2}\)

A. 16
B. 14
C. 12
D. 9

Question 257:

• JAMB 1990

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 258:

• JAMB 1990

Find the solution of the equation x - 8\(\sqrt{x}\) + 15 = 0

A. 3, 5
B. -3, -5
C. 9, 25
D. -9, 25

Question 259:

• JAMB 1990

Simplify \(\frac{x}{x + y}\) + \(\frac{y}{x - y}\) - \(\frac{x^2}{x^2 - y^2}\)

A. \(\frac{x}{x^2 - y^2}\)
B. \(\frac{y^2}{x^2 - y^2}\)
C. \(\frac{x^2}{x^2 - y^2}\)
D. \(\frac{y}{x^2 - y^2}\)

Question 260:

• JAMB 1990

Given that x² + y² + z² = 194, calculate z if x = 7 and \(\sqrt{y}\) = 3

A. \(\sqrt{10}\)
B. 8
C. 12.2
D. 13.4