Explicație pas cu pas:
[tex]a) \sqrt{2} \times \sqrt{5} = \sqrt{2 \times 5} = \sqrt{10} [/tex]
[tex]b) \sqrt{7} \times \sqrt{3} = \sqrt{7 \times 3} = \sqrt{21} [/tex]
[tex]c) \sqrt{11} \times \sqrt{7} = \sqrt{11 \times 7} = \sqrt{77} [/tex]
[tex]d) \sqrt{10} \times \sqrt{21} = \sqrt{10 \times 21} = \sqrt{210} [/tex]
[tex]e)5 \sqrt{3} \times 3 \sqrt{5} = 5 \times 3 \sqrt{3 \times 5} = 5 \times 3 \sqrt{15} = 15 \sqrt{15} [/tex]
[tex]f)2 \sqrt{15} \times 3 \sqrt{2} = 2 \times 3 \sqrt{15 \times 2} = 2 \times 3 \sqrt{30} = 6 \sqrt{30} [/tex]
[tex]g)3 \sqrt{10} \times 2 \sqrt{3} = 3 \times 2 \sqrt{10 \times 3} = 3 \times 2 \sqrt{30} = 6 \sqrt{30} [/tex]
