Question

The values of $x$ satisfying the equation
$\left[\begin{array}{cc}1& 6\\ x^2& 4\end{array}\right]$ $-\left[\begin{array}{cc}1& 1\\ 2x& 0\end{array}\right]$=$\left[\begin{array}{cc}0& 5\\ 0& 4\end{array}\right]$ are

• A. $0,2$
• B. $0,1$
• C. $\pm 1$
• D. $\pm 2$

Answer 1

The correct option is A $0,2$

By comparing, we have

$x^2-2x=0$

$\Rightarrow x(x-2)=0$

$\Rightarrow x=0,2$