[tex] \sqrt{2} \times \sqrt{3} = \sqrt{6} \\ \sqrt{3 } \times \sqrt{5} = \sqrt{15} \\ \sqrt{5} \times ( - \sqrt{7} ) = - \sqrt{35} \\ - \sqrt{5} \times \sqrt{11} = - \sqrt{55} \\ ( - \sqrt{13} \times ( - \sqrt{2} ) = \sqrt{26} \\ - \sqrt{2} \times ( - \sqrt{3} ) \times ( - \sqrt{5} ) = \sqrt{6} \times ( - \sqrt{5} ) = - \sqrt{30} [/tex]
cu drag:D
