Answer
a) $3$$\sqrt5$
b) 4
c) $6$$\sqrt[3] 2$
Work Step by Step
a) $\sqrt 3$$\sqrt 15$ = $\sqrt {3\times3\times5}$ = $\sqrt 9$$\sqrt 5$ = 3$\sqrt 5$
b) $\frac{\sqrt {48}}{\sqrt 3}$ = $\frac{\sqrt {3\times2\times8}}{\sqrt 3}$ = $\sqrt {16}$ = 4
c) $\sqrt[3]{24}$$\sqrt[3] {18}$= $\sqrt[3] {6^{3}\times2}$ = $6$$\sqrt[3] 2$