Question

If ${\displaystyle \left|\begin{array}{cc}2\text{x}& 5\\ 8& \text{x}\end{array}\right|=\left|\begin{array}{cc}6& -2\\ 7& 3\end{array}\right|,}$  then the value of x is ____________.

Options

• 3

• ${\displaystyle \pm 3}$

• ${\displaystyle \pm 6}$

• 6

Answer 1

If ${\displaystyle \left|\begin{array}{cc}2\text{x}& 5\\ 8& \text{x}\end{array}\right|=\left|\begin{array}{cc}6& -2\\ 7& 3\end{array}\right|,}$  then the value of x is ${\displaystyle \underline{\pm 6}}$.