Question

what is the value of 6 √5 multiply by 13√5​

Answer 1

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 6 \sqrt{5} \times 13 \sqrt{5} \\ \: \: \: \: \: = 78 \times 5 \\ = 390$

Answer 2

$6 \sqrt{5} \times 13 \sqrt{5}$

$6 \times \sqrt{5} \times 13 \times \sqrt{5}$

$6 \times 13 \times \sqrt{5} \times \sqrt{5}$

$78 \times \sqrt{5} \times \sqrt{5}$

$78 \times \sqrt{25}$

$78 \times 5$

$390$

$\large \boxed{ 6 \sqrt{5} \times 13 \sqrt{5} = 390}$

Note :

$\sqrt{x} \times \sqrt{x} = \sqrt{ {x}^{2} } = x$

$eg \: 1: \sqrt{5} \times \sqrt{5} = 5$

$eg \: 2: \sqrt{2} \times \sqrt{2 } = 2$

$\\ \\ \bf{Hope \: \: this \: \: helps \: \: you \: !}$