Question

bài 39 40 41 43 44 . MN LÀM ƠN GIÚP VỚI!

Answer 1

Bài 39:

a) \(\sqrt{49\cdot360}=7\cdot6\sqrt{10}=42\sqrt{10}\)

b) \(-\sqrt{500\cdot162}=-10\sqrt{5}\cdot9\sqrt{2}=-90\sqrt{10}\)

c) \(\sqrt{125a^2}=5\sqrt{2}\cdot\left|a\right|=-5\sqrt{2}a\)

d) \(\dfrac{1}{3}\cdot\sqrt{225a^2}=\dfrac{1}{3}\cdot15\left|a\right|=5\left|a\right|\)