Question

Ai giúp minh giải căn bậc 2 với 

(81x^4y^6) / (729x^6y^6)

(80ab) / (125a)

(75y^3) / (3y^5)

Answer 1

\(\sqrt{\dfrac{81x^4y^6}{729x^6y^6}}=\sqrt{\dfrac{1}{9x^2}}=\dfrac{1}{3x}\)

b: \(\sqrt{\dfrac{80ab}{125a}}=\sqrt{\dfrac{16}{25}b}=\dfrac{4}{5}\sqrt{b}\)

c: \(=\sqrt{\dfrac{25}{y^2}}=\dfrac{5}{y}\)