Question

$\sqrt{27} + \sqrt{12}$
$\sqrt{8 - \sqrt{18} }$
$\sqrt{32 - 72}$
$\sqrt{45} - \sqrt{20}$
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Answer 1

Răspuns:

$\sqrt{27} + \sqrt{12} = 3 \sqrt{3} + 2 \sqrt{3} = 5 \sqrt{3} \\ \sqrt{8 - \sqrt{18} } = \sqrt{8 - 3 \sqrt{2} } \\ \sqrt{32 - 72} = \sqrt{ - 40} = multimea \: vida \\ \sqrt{45} - \sqrt{20} = 3 \sqrt{5} - 2 \sqrt{5} = \sqrt{5}$