Since $$A$$ is skew symmetric, therefore, each diagonal entry of $$A$$ is zero$$\ herefore \\quad x=0$$Thus putting this value in A, we get $$a_{21}=-1$$ and $$a_{12}=2$$i.e $$a_{21}$$ $$\
eq$$ $$-a_{12}$$ $$\ herefore \\quad A$$ cannot be skew symmetric matrix.