Question

question is in attatchment

Answer 1

3 root (7×7×3)-root of 1/3(5-9)

21 root 3+4 root 1/3

Answer 2

Answer:

$\boxed{ 21\sqrt{3}+4\sqrt{\frac{1}{3}}}$

Step-by-step explanation:

$3\sqrt{147}-5\sqrt{\frac{1}{3}}+9\sqrt{\frac{1}{3}}\\\\\implies 3\sqrt{49\times3}+4\sqrt{\frac{1}{3}}\\\\\implies 21\sqrt{3}+4\sqrt{\frac{1}{3}}$