Question

If there are two values of ‘a’ which makes determinant
$\Delta=\begin{bmatrix} 1 & -2 & 5 \\\ 2 & a & -1 \\\ 0 & 4 & 2a \\\ \end{bmatrix}=86$
Then the sum of these numbers

• A. -4
• B. 4
• C. 9
• D. 5

Answer 1

Answer: (A)

-4

Answer 2

The correct answer is (A) : -4