Jamb Mathematics 1989 Past Questions and Answers

Question 16:

• JAMB 1989

If \(f(x) = 2x^2 - 5x + 3\), find f(x + 1).

A. 2x² - x
B. 2x² - x + 10
C. 4x² + 3x + 2
D. 4x² + 3x + 12

Question 17:

• JAMB 1989

Solve for a positive number x such that \(2^{(x^3 - x^2 - 2x)} = 1\)

A. 4
B. 3
C. 2
D. 1

Question 18:

• JAMB 1989

Simplify \(\frac{324 - 4x^2}{2x + 18}\)

A. 2(x - 9)
B. 2(9 + x)
C. 81 - x²
D. -2(x - 9)

Question 19:

• JAMB 1989

Factorize completely \(y^3 -4xy + xy^3 - 4y\)

A. (y + xy)(y + 2)(y - 2)
B. (y - xy)(y - 2)
C. Y(1 + x)(y + 2)(y -2)
D. Y(1 - x)(y + 2)(y - 2)

Question 20:

• JAMB 1989

Factorize 4a² - 12ab - C² + 9b²

A. 4a(a - 3b) + (3b - c)²
B. (2a + 3b - c)(2a + 3b + c)
C. (2a - 3b + c)(2a - 3b - c)
D. 4a(a - 3b) + (3b + c)