Question

 Rút gọn 

a. Căn54

b. Căn50a

c. Căn(5(1-căn3)^2)

 

Answer 1

a/\(\sqrt{54}=3\sqrt{6}\)

b/\(\sqrt{50a}=\sqrt{50}.\sqrt{a}=5\sqrt{2}.\sqrt{a}\)

c/ \(\sqrt{5\left(\sqrt{3}\right)^2=}\sqrt{5.3}=\sqrt{15}\)

Answer 2

a) \(\sqrt{54}=\sqrt{9.6}=\sqrt{9}.\sqrt{6}=3\sqrt{6}\)

b) \(\sqrt{50a}=\sqrt{25.2a}=\sqrt{5^2.2a}=5\sqrt{2a}\)