For what value of x will |\( -{ A }^{ T } \)| =18 if A = \(\begin{bmatrix}3 & 2\\9 & x \end{bmatrix}\)?
Answer & explanation
Correct answer: option 3
Given that |-\( { A }^{ T } \)| =18
Hence, |-\( { A }^{ T } \)| = 3x-18 = 18
3x = 36
x = 12
For what value of x will |\( -{ A }^{ T } \)| =18 if A = \(\begin{bmatrix}3 & 2\\9 & x \end{bmatrix}\)?
Correct answer: option 3
Given that |-\( { A }^{ T } \)| =18
Hence, |-\( { A }^{ T } \)| = 3x-18 = 18
3x = 36
x = 12