Question

square root of 21-4√5+8√3-4√15

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

3.2286

Step-by-step explanation:

Given : $21-4\sqrt{5}+8\sqrt{3}-4\sqrt{15}$

To Find : Square root of given expression

Solution:

$\sqrt{21-4\sqrt{5}+8\sqrt{3}-4\sqrt{15}}$  ---A

$\sqrt{5}=2.2360$

$\sqrt{3}=1.7320$

$\sqrt{15}=3.872$

Substitute the values in A

$\sqrt{21-4(2.2360)+8(1.7320)-4(3.872)}$

$\sqrt{10.424}$

$3.2286$

Hence $\sqrt{21-4\sqrt{5}+8\sqrt{3}-4\sqrt{15}}=3.2286$