Question

Answer 1

\(P=5\cdot\dfrac{4}{3}=\dfrac{20}{3}\)

Answer 2

\(P=5.\dfrac{\sqrt{160}}{\sqrt{90}}\)

\(=\dfrac{5\sqrt{16}.\sqrt{10}}{\sqrt{9}.\sqrt{10}}=\dfrac{5\sqrt{4^2}}{\sqrt{3^2}}=\dfrac{20}{3}\)

Answer 3

Ta có : \(P=5\cdot\dfrac{\sqrt{160}}{\sqrt{90}}=5\cdot\sqrt{\dfrac{160}{90}}=5\cdot\sqrt{\dfrac{16}{9}}=5\cdot\dfrac{4}{3}=\dfrac{20}{3}\)

Vậy P = 20/3