Question

Calculati :

$a) \sqrt{1.44} \: + \sqrt{50 - {5}^{2} } =$
$b)2 \times \sqrt{3} \: \times 5 \times \sqrt{13} =$

Answer 1

$a) \sqrt{1.44} + \sqrt{50 - {5}^{2} }$

$= \sqrt{ \frac{144}{100} } + \sqrt{50 - 25}$

$= \frac{ \sqrt{144} }{ \sqrt{100} } + \sqrt{25}$

$= \frac{12}{10} + 5$

$= \frac{6}{5} + 5$

$= \frac{6}{5} + \frac{25}{5}$

$= \frac{6 + 25}{5}$

$= \frac{31}{5}$

$b)2 \times \sqrt{3} \times 5 \times \sqrt{13} = 2 \times 5 \sqrt{3 \times 13} = 10 \sqrt{39}$

Answer 2

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