Question

Plz answer for 20 pts

Answer 1

Answer:

$6) \: \: \sqrt{3} + 4 \sqrt{3} \: = \: 5\sqrt{3}$

$7) \: \: 3\sqrt{5}+ 6\sqrt{45} = 3\sqrt{5}+6\sqrt{9} \! \cdot \! \sqrt{5}$

$= 3\sqrt{5} + 6\! \cdot \! 3 \! \cdot \! \sqrt{5}=3 \sqrt{5} + 18 \sqrt{5} = 21\sqrt{5}$

Answer 2

Answer to Problem 1: 5√3

Answer to Problem 2: 21√5