## anonymous 4 years ago 5 sqrt 3 times 4 sqrt 15

$5 \sqrt3 \times 4 \sqrt15$$20 \sqrt45$You multiply the numbers outside the root and the numbers inside the root separately. You can simplify this to...$20\sqrt{5 \times 3 \times 3}$$60 \sqrt5$ Because the two 3s in the root can be taken out.