Practicing Success
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 |
\(3\) \(\pm 3\) \(\pm 6\) \(6\) |
\(\pm 6\) |
2x2 - 40 = 18 + 14 2x2 - 40 = 32 2x2 = 32 + 40 2x2 = 72 x2 = 36 x = ±6 |