Question

Simplify:
√45 -3√20 +4√5

Answer 1

Answer:

2.23606798

Step-by-step explanation:

this I the corect answer pls like

Answer 2

$\sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5} \\ = \sqrt{9 \times5} - 3 \sqrt{4 \times 5} + 4 \sqrt{5} \\ = 3 \sqrt{5} - 3 \times 2 \sqrt{5} + 4 \sqrt{5} \\ = 7\sqrt{5} - 6 \sqrt{5} \\ = 1 \sqrt{5} \\ = \sqrt{5}$