ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 491:

• JAMB 2009

A binary operation ⊗ defined on the set of integers is such that m⊗n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0

A. -⁵/₄
B. -⁵/₆
C. Zero
D. 5

Question 492:

• JAMB 2009

If Q is\( \left[ \begin{array}{cc}
9 & -2 \\
-7 & 4 \\
\end{array} \right]\) , then |Q| is

A. -50
B. -22
C. 22
D. 50

Question 493:

• JAMB 2009

If P \(=\left[\begin{array}{cc}x+3 & x+2\\
x+1 & x-1\end{array}\right]\) evaluate x if |P| = -10

A. -5
B. -2
C. 2
D. 5

Question 494:

• JAMB 2010

Factorize completely \(\frac{x^{3} + 3x^{2} - 10x}{2x^{2} - 8}\)

A. x(x-5)

2(x+2)

B. x(x-5)

2(x-2)

C. x(x+5)

2(x+2)

D. x²+5

2x+4

Question 495:

• JAMB 2010

If y varies directly as the square root of x and y = 3 when x = 16. Calculate y when x = 64

A. 12
B. 6
C. 3
D. 5