If A= [ ll 3 & 4 5 & 2 ] and 2A + B is a null matrix, then B is e… - Vidyadip

MCQ

If $A=\left[\begin{array}{ll}3 & 4 \\ 5 & 2\end{array}\right]$ and 2A + B is a null matrix, then B is equal to:

A
$\left[\begin{array}{ll}-5 & -8 \\ -10 & -3\end{array}\right]$
B
$\left[\begin{array}{ll}5 & 8 \\ 10 & 3\end{array}\right]$
✓
$\left[\begin{array}{ll}-6 & -8 \\ -10 & -4\end{array}\right]$
D
$\left[\begin{array}{ll}6 & 8 \\ 10 & 4\end{array}\right]$

✓

Answer

Correct option: C.

$\left[\begin{array}{ll}-6 & -8 \\ -10 & -4\end{array}\right]$

(c) $\left[\begin{array}{ll}-6 & -8 \\ -10 & -4\end{array}\right]$
Explanation: $\left[\begin{array}{ll}-6 & -8 \\ -10 & -4\end{array}\right]$

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