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[tex]a) \sqrt{2}*\sqrt{3} =\sqrt{6}[/tex]
[tex]b) \sqrt{3} *\sqrt{5} =\sqrt{15}[/tex]
[tex]c) \sqrt{5} *(-\sqrt{7} )=-\sqrt{35}[/tex]
[tex]d) -\sqrt{5} *\sqrt{11}=-\sqrt{55}[/tex]
[tex]e) (-\sqrt{13} )*(-\sqrt{2} )=\sqrt{26}[/tex]
[tex]f) -\sqrt{2} *(-\sqrt{3} )*(-\sqrt{5} )=\sqrt{6} *(-\sqrt{5} )=-\sqrt{30}[/tex]
