Rút gọn

\(a.\sqrt{9\text{8}}-\sqrt{72}\text{+}\frac{\text{1}}{2}\sqrt{\text{8}}\)

b.\(\sqrt{\text{16}a}\text{+}2\sqrt{40a}-\text{3}\sqrt{90a}\)

c.\(\left(2\sqrt{\text{3}}\text{+}\sqrt{\text{5 }}\right)\sqrt{\text{3}}-\sqrt{\text{6}0}\)

Đưa thừa số ra ngoài dấu căn:

a.\(\sqrt{49.\text{3}\text{6}0}\)

b.\(\sqrt{\text{1}2\text{5}a^2}\) với a<0

c.\(-\sqrt{\text{5}00.\text{1}\text{6}2}\)

d.\(\frac{\text{1}}{\text{3}}\sqrt{22\text{5}a^2}\) với a>0

Rút gọn :

a.\(\text{3}\sqrt{2}\text{+ }4\sqrt{\text{8}}-\sqrt{\text{1}\text{8}}\)

b.\(\sqrt{\text{3}}-\frac{\text{1}}{\text{3}}\sqrt{27}\text{+ }2\sqrt{\text{5}07}\)

c.\(\sqrt{2\text{5}a}\text{+ }\sqrt{49a}-\sqrt{\text{6}4a}\)

d.\(-\sqrt{\text{3}\text{6}b}\text{−}\frac{\text{1}}{\text{3}}\sqrt{\text{5}4b}\text{+}\frac{\text{1}}{\text{5}}\sqrt{\text{1}\text{5}0b}\)

Đưa thừa số ra ngoài dấu căn :

a. \(\sqrt{9\text{6}}.\sqrt{\text{1}2\text{5}}\)

b.\(\sqrt{a^4.\text{6}^{\text{5}}}\)

c.\(\sqrt{a^{\text{6}}.b^{\text{1}\text{1}}}\)

d.\(\:\sqrt{a^{\text{3}}\left(\text{1}-a\right)^4}\)