Jamb Mathematics 1984 Past Questions and Answers

Question 16:

• JAMB 1984

Factorize 6x2 - 14x - 12

A. 2(x + 3)(3x - 2)
B. 6(x - 2)(x + 1)
C. 2(x - 3)(3x + 2)
D. 6(x + 2)(x - 1)
E. (3x - 4)(2x + 3)

Question 17:

• JAMB 1984

A straight line y = mx meets the curve y = x2 - 12x + 40 in two distinct points. If one of them is (5, 5) find the other

A. (5, 6)
B. (8, 8)
C. (8, 5)
D. (7,7)
E. (7, 5)

Question 18:

• JAMB 1984

The table below is drawn for a graph y = x³ - 3x + 1
\(\begin{array}{c|c} x & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\\hline y = x^3 - 3x + 1 & 1 & -1 & 3 & 1 & -1 & 3 & 1\end{array}\)
From x = -2 to x = 1, the graph crosses the x-axis in the range(s)

A. -1 < x < 0 and 0 < x < 1
B. -2 < x < -1 and 0 < x < 1
C. -2 < x < -1 and -1 < x < 0
D. 0 < x < 1

Question 19:

• JAMB 1984

In a racing competition, Musa covered a distance 5x km in the first hour and (x + 10)km in the next hour. He was second to Nzozi who covered a total distance of 118km in the two hours. Which of the following inequalities is correct?

A. -1 < x < x < 0
B. -3 < x < 3
C. 0 \(\leq\) x < 18
D. 15 < x < 18

Question 20:

• JAMB 1984

If 2x + 3y = 1 and x - 2y = 11, find (x + y)

A. 5
B. -3
C. 8
D. 2
E. -2