Question

Answer 1

\(=6\sqrt{13}+\dfrac{1}{5}\cdot5\sqrt{13}-4\sqrt{13}=3\sqrt{13}\)

Answer 2

\(3\sqrt{52}+\dfrac{1}{5}\sqrt{325}-\sqrt{208}\)

\(\Leftrightarrow3.2\sqrt{13}+\dfrac{1}{5}.5\sqrt{13}-4\sqrt{13}\)

\(\Leftrightarrow\) \(6\sqrt{13}+\sqrt{13}-4\sqrt{13}\)

\(\Leftrightarrow3\sqrt{13}\)

Answer 3

Trl: = 6 √ 13 + 15 ⋅ 5 √ 13 − 4 √ 13 = 3 √ 13