Polynomials - Jamb Mathematics Past Questions and Answers

Question 121:

• 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 122:

• 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)

Question 123:

• JAMB 1989

What are K and L respectively if \(\frac{1}{2}\)(3y - 4x)² = (8x² + kxy + Ly²)

A. -12, \(\frac{9}{2}\)
B. -6, 9
C. 6, 9
D. 12, \(\frac{9}{2}\)

Question 124:

• JAMB 1989

Solve the pair of equation for x and y respectively \(2x^{-1} - 3y^{-1} = 4; 4x^{-1} + y^{-1} = 1\)

A. -1, 2
B. 1, 2
C. 2, 1
D. 2, -1

Question 125:

• JAMB 1989

What value of Q will make the expression 4x² + 5x + Q a complete square?

A. \(\frac{25}{16}\)
B. \(\frac{25}{64}\)
C. \(\frac{5}{8}\)
D. \(\frac{5}{4}\)