Question

Por favor alguém me ajuda!!!!

Answer 1

$a) \sqrt{98} + \sqrt{175} = 7 \sqrt{2} + 5 \sqrt{7} \\ \\ b) \sqrt{ \frac{9 \times 16}{81} } = \frac{ \sqrt{9 \times 16} }{ \sqrt{81} } = \frac{ \sqrt{9} \times \sqrt{16} }{9} = \\ = \frac{3 \times 4}{9} = \frac{4}{3} \\ \\ c) {4}^{ \frac{1}{2} } = \sqrt{4} = 2 \\ \\ d) \frac{15}{5 \sqrt{2} } = \frac{15 \sqrt{2} }{10} = \\ = \frac{3 \sqrt{2} }{2} \\ \\ 6) \frac{ \sqrt{5 } + \sqrt{2} }{ \sqrt{2} } = \frac{( \sqrt{5} + \sqrt{2}) \sqrt{2} }{2} = \\ = \frac{ \sqrt{10} + 2}{2}$