Question

How to simplify root 45 - 3root20 + 4root5 ?

Answer 1

》root 45- 3 root 20+ 4 root 5
= 3 root 5 - 3× 2 root 5 + 4root 5
= 3 root - 6 root 5 + 4 root 5
= - 3 root 5 + 4 root 5
= root 5


Hope, it helped

Answer 2

➡HERE HERE IS YOUR ANSWER⬇

Now,

$\sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5} \\ \\ = \sqrt{5.3.3} - 3 \sqrt{2.2.5} + 4 \sqrt{5} \\ \\ = 3 \sqrt{5} - 6 \sqrt{5} + 4\sqrt{5} \\ \\ = (3 - 6 + 4) \sqrt{5} \\ \\ = \sqrt{5}$

⬆HOPE THIS HELPS YOU⬅