Răspuns :
[tex]( - 3x { }^{3} \times y {}^{2} \times z) {}^{2} = ( - 3) {}^{2} \times (x {}^{3} ) {}^{2} \times (y {}^{2} ) \times ( {z}^{2} ) = 9x {}^{6} {y}^{4} {z}^{2} [/tex]
[tex]( - 3x { }^{3} \times y {}^{2} \times z) {}^{2} = ( - 3) {}^{2} \times (x {}^{3} ) {}^{2} \times (y {}^{2} ) \times ( {z}^{2} ) = 9x {}^{6} {y}^{4} {z}^{2} [/tex]