Răspuns:
[tex]a) \sqrt{2} \times \sqrt{5} = \sqrt{2 \times 5} = \sqrt{10} \\ b) \sqrt{5} \times \sqrt{11} = \sqrt{5 \times 11} = \sqrt{55} \\ c) \sqrt{3} \times \sqrt{8} = \sqrt{3 \times 8} = \sqrt{24} = 2 \sqrt{6} \\ d) \sqrt{6} \times \sqrt{12} = \sqrt{6 \times 12} = \sqrt{72} = 6 \sqrt{2} \\ e)15 \times 6 = \sqrt{15 \times 6} = \sqrt{90} = 3 \sqrt{10} [/tex]
