Răspuns:
[tex]a) \frac{1}{3} \times \sqrt{ \frac{9}{100} } + \frac{2}{7} \times \sqrt{ \frac{196}{100} } - \sqrt{ \frac{676}{100} } \times \frac{2}{13} = \frac{1}{3} \times \frac{ \sqrt{9} }{ \sqrt{100} } + \frac{2}{7} \times \frac{ \sqrt{196} }{ \sqrt{100} } - \frac{ \sqrt{676} }{ \sqrt{100} } \times \frac{2}{13} = \frac{1}{3} \times \frac{3}{10} + \frac{2}{7} \times \frac{14}{10} - \frac{26}{10} \times \frac{2}{13} = \frac{1}{10} + \frac{4}{10} - \frac{4}{10} = \frac{1}{10} [/tex]
[tex]b) \sqrt{ {12}^{2} + {9}^{2} } = \sqrt{144 + 81} = \sqrt{225} = 15[/tex]
[tex]c) = 7 - 5 + 10 + 9 \div |3| = 7 - 5 + 10 + 9 \div 3 = 7 - 5 + 10 + 3 = 15[/tex]
[tex]d) \sqrt{ {15}^{2} - {9}^{2} - {16}^{2} } = \sqrt{225 - 81 - 256} = \sqrt{144 - 256} = \sqrt{ - 112} \: nu \: apartine \: multimii \: numerelor \: reale[/tex]
