Jamb Mathematics 1982 Past Questions and Answers

Question 6:

• JAMB 1982

The factors of 6x - 5 - x2 are

A. -(x + 3)(x + 2)
B. (x + 5)(x + 1)
C. (x - 5)(1 - x)
D. (x + 1)(x + 5)

Question 7:

• JAMB 1982

The solution of the quadratic equation bx2 + cx + a = 0 is given by

A. X = b \(\pm\) \(\frac{\sqrt{b^2 - 4ac}}{2a}\)
B. X = c \(\pm\) \(\frac{\sqrt{b^2 - 4ab}}{2b}\)
C. X = -c \(\pm\) \(\frac{\sqrt{c^2 - 4ab}}{2b}\)
D. X = -b \(\pm\) \(\frac{\sqrt{b^2 - 4ac}}{2b}\)

Question 8:

• JAMB 1982

The graphical method of solving the equation x3 + 3x2 + 4x - 28 = 0 is by drawing the graphs of the curves

A. Y = x³ and y = 3x² + x - 28
B. Y = x³ + 3x² + 4x + 4 and the line y = \(\frac{28}{x}\)
C. Y = x³ + 3x² + 4x and y
D. Y = x² + 3x + 4 and y = \(\frac{28}{x}\)
E. Y = x² + 3x + 4 and line y = 28x

Question 9:

• JAMB 1982

Write the equation 2 log2x - x log2(1 + y) = 3 in a form not involving logarithms

A. 2^x(1 + y) = 3
B. 2^x - x(1 + y) = 8
C. X² = 8(1 + y)^x
D. X² - x(1 + y) = 8
E. X² - (1 + y)² = 8

Question 10:

• JAMB 1982

Find \(\alpha\) and \(\beta\) such that x\(\frac{3}{8}\) x y\(\frac{-6}{7}\) x (\(\frac{y^{\frac{9}{7}}}{x^{\frac{45}{8}}}\))\(\frac{1}{9}\) = \(\frac{y^{\alpha}}{y^{\beta}}\)

A. \(\alpha\) = 1, \(\beta\) = \(\frac{5}{7}\)
B. \(\alpha\)= 1, \(\beta\) = -\(\frac{5}{7}\)
C. \(\alpha\)= \(\frac{3}{5}\), \(\beta\) = -6
D. \(\alpha\)= 1, \(\beta\) = -\(\frac{3}{5}\)