Question

please solve in notebook ...

Answer 1

Determinant =

$1( \: (1)(1) - ( {x}^{2} x )) - x( {x}^{2} - {x}^{2} ) + {x}^{2} ( {x}^{4} - x)$

$= (1 - {x}^{3} ) + {x}^{3} ( {x}^{3} - 1)$

$= (1 - {x}^{3} )^{2}$

Answer 2

we can apply different row nd colum transformation