a)
[tex]3 \sqrt{5} \times 2 \sqrt{2} = 6 \sqrt{10} [/tex]
b)
[tex]5 \sqrt{3} \times 4 \sqrt{7} = 20 \sqrt{21} [/tex]
c)
[tex] \sqrt{12} \times 8 \sqrt{3} = 8 \sqrt{36} = 8 \times 6 = 48[/tex]
d)
[tex]3 \sqrt{2} \times 2 \sqrt{8} = 6 \sqrt{16} = 6 \times 4 = 24[/tex]
e)
[tex]2 \sqrt{13} \times 5 \sqrt{13} = 10 \sqrt{169} = 10 \times 13 = 130[/tex]
