If \(\left|\begin{array}{ll}2x & 5\\ 8& x\end{array}\right|=\left|\begin{array}{ll}6 & -2\\ 7&3\end{array}\right|\) then the value of \(x\) is
Answer & explanation
Correct answer: option 3
2x2 - 40 = 18 + 14
2x2 - 40 = 32
2x2 = 32 + 40
2x2 = 72
x2 = 36
x = ±6