Răspuns:
Salutare !
[tex]a)x = 5 \sqrt{12} - \sqrt{75} - 2 \sqrt{27} [/tex]
[tex]x = 10 \sqrt{3} - 5 \sqrt{3} - 6 \sqrt{3} [/tex]
[tex]x = - \sqrt{3} [/tex]
[tex]y = 5 \sqrt{24} - 3 \sqrt{54} - \sqrt{150} [/tex]
[tex]y = 10 \sqrt{6} - 9 \sqrt{6} - 5 \sqrt{6} [/tex]
[tex]y = - 4 \sqrt{6} [/tex]
[tex]x \times y = - \sqrt{3} \times ( - 4 \sqrt{6} )[/tex]
[tex]x \times y = 4 \sqrt{18} = 12 \sqrt{2} [/tex]
[tex]b)x = \sqrt{54} + 4 \sqrt{24} - 2 \sqrt{150} [/tex]
[tex]x = 3 \sqrt{6} + 8 \sqrt{6} - 10 \sqrt{6} [/tex]
[tex]x = \sqrt{6} [/tex]
[tex]y = \sqrt{18} - 5 \sqrt{72} + 3 \sqrt{98} [/tex]
[tex]y = 3 \sqrt{2} - 30 \sqrt{2} + 21 \sqrt{2} [/tex]
[tex]y = - 6 \sqrt{2} [/tex]
[tex]x \times y = 12 \sqrt{2} \times \sqrt{6} [/tex]
[tex]x \times y = 12 \sqrt{12} [/tex]
[tex]x \times y = 24 \sqrt{3} [/tex]
