If (\begin{±atrix} 2 & 1 \\\ 3 & 2 \\\ \end{±atrix}A=\begin{... | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

If $\begin{pmatrix} 2 & 1 \\\ 3 & 2 \\\ \end{pmatrix}A=\begin{pmatrix} 1 & 0 \\\ 0 & 1 \\\ \end{pmatrix}$ , then the matrix A is

A

$\begin{pmatrix} 2 & 1 \\\ 3 & 2 \\\ \end{pmatrix}$

B

$\begin{pmatrix} 2 & -1 \\\ -3 & 2 \\\ \end{pmatrix}$

C

$\begin{pmatrix} -2 & 1 \\\ 3 & -2 \\\ \end{pmatrix}$

D

$\begin{pmatrix} 2 & -1 \\\ 3 & 2 \\\ \end{pmatrix}$

Answer

$\begin{pmatrix} 2 & -1 \\\ -3 & 2 \\\ \end{pmatrix}$

Explanation

Solution

The correct answer is (B) : $\begin{pmatrix} 2 & -1 \\\ -3 & 2 \\\ \end{pmatrix}$ .