Polynomials - Jamb Mathematics Past Questions and Answers

Question 61:

• JAMB 1980

Find the roots of the equation 10x² - 13x - 3 = 0

A. X = \(\frac{3}{5}\) or -\(\frac{1}{2}\)
B. X = \(\frac{3}{10}\) or -1
C. X = \(\frac{3}{10}\) or 1
D. X = \(\frac{1}{5}\) or \(\frac{-3}{2}\)
E. X = -\(\frac{1}{5}\) or \(\frac{3}{2}\)

Question 62:

• JAMB 1980

Make c the subject of formula v = 1 - \(\frac{a}{5}\)(b + \(\frac{3c}{7}\))

A. [\(\frac{7}{3}\) + \(\frac{5}{a}\)(v - 1)] + b
B. [\(\frac{7b}{3}\) + \(\frac{5}{a}\)(v - 1)]
C. \(\frac{7}{3}\)[b + \(\frac{5}{a}\)(v - 1)]
D. \(\frac{7}{3}\)[b + \(\frac{5v - 1}{a}\)]

Question 63:

• JAMB 1980

What factor is common to all the expressions x² - x, 2x² + x - 1 and x² - 1?

A. X
B. X + 1
C. X - 1
D. No common factor
E. (2x - 1)

Question 64:

• JAMB 1980

Three numbers, x, y and z are connected by the relationships y = \(\frac{4x}{9}\) + 1. If x = 99, find z

A. 6\(\frac{1}{3}\)
B. 20
C. 21
D. 176\(\frac{4}{9}\)
E. None of the above

Question 65:

• JAMB 1980

What will be the value of k so that the quadratic equation kx² - 4x + 1 = 0 has two equal roots?

A. 2
B. 3
C. 4
D. 8
E. \(\frac{1}{4}\)