Răspuns:
[tex]\mathbf{- \sqrt{2} x {}^{3} }[/tex]
Explicație pas cu pas:
[tex]$\mathbf{2x {}^{3}y \times ( - \frac{1}{ \sqrt{2}y } ) }$[/tex]
[tex]$\mathbf{ - 2x {}^{3} \times \frac{1}{ \sqrt{2} } ; \: \: ( + )( - ) = ( - )}$[/tex]
[tex]$\mathbf{ - \frac{2x {}^{3} \times 1}{ \sqrt{2} } = - \frac{2x {}^{3} }{ \sqrt{2} } }$[/tex]
[tex]$\mathbf{rationalizam \: = \: - \frac{ 2x {}^{3} }{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } = - \frac{2 \sqrt{2} x {}^{3} }{ \sqrt{2} \sqrt{2} } }$[/tex]
[tex]$\mathbf{ \:\boxed{ \mathbf{ - \sqrt{2} x {}^{3} } }}$[/tex]
Bafta ! :)
