Question

[Sách Giáo Khoa]

Tính:

a. \(\sqrt{\dfrac{289}{225}};\)           b. \(\sqrt{2\dfrac{14}{25}};\)               c. \(\sqrt{\dfrac{0,25}{9}};\)         d. \(\sqrt{\dfrac{8,1}{1,6}}.\)

Answer 1

[qwerty]

a) ; b) ;

c) ; d) .

Answer 2

[Nandemonai Ya]

a) \(\sqrt{\dfrac{289}{225}}=\dfrac{\sqrt{289}}{\sqrt{225}}=\dfrac{17}{15}\)

b) \(\sqrt{2\dfrac{14}{25}}=\dfrac{\sqrt{64}}{\sqrt{25}}=\dfrac{8}{5}\)

c) \(\sqrt{\dfrac{0,25}{9}}=\dfrac{\sqrt{0,25}}{\sqrt{9}}=\dfrac{0,5}{3}=\dfrac{1}{6}\)

d) \(\sqrt{\dfrac{8,1}{1,6}}=\dfrac{\sqrt{81}}{\sqrt{16}}=\dfrac{9}{4}\)