Question

Resolva a equação:
|x x 1|
|0 3 -1| = 0
|1 4 0|

Answer 1

$\boxed{\boxed{\mathsf{\begin{vmatrix}x&x&1\\0&3&-1\\1&4&0\end{vmatrix} = 0}}}$

$x(0+4)-x(0+1)+1(0-3)=0$

$4x-x-3=0\\3x-3=0\\3x=3\\x=\dfrac{3}{3}$

$\boxed{\boxed{\mathsf{x=1}}}$