Question

va rogggggggggggggggggg!!​

Answer 1

Răspuns:

Explicație pas cu pas:

x=(5·3√2-4·5√2+7√2)·3√2=(15√2-20√2+7√2)·3√2=2√2·3√2=2·3·2=

x=12

y=√(9+9·8)-12+6=√81-6=9-6=3

mg=√xy=√12·3=√36=6

Answer 2

$x = (5 \sqrt{18} - 4 \sqrt{50} + \sqrt{98} ) \times 3 \sqrt{2} \\ x = (15 \sqrt{2} - 20 \sqrt{2} + 7 \sqrt{2} ) \times 3 \sqrt{2} \\ x = 2 \sqrt{2} \times 3 \sqrt{2} \\ x = 6 \times 2 \\ x = 12 \\ \\ y = \sqrt{9 + 9 \sqrt{64} } - \sqrt{13 {}^{2} - 5 {}^{2} } + \sqrt{( - 6) {}^{2} } \\ y = \sqrt{9 + 9 \times 8} - \sqrt{(13 + 5)(13 - 5)} + 6 \\ y = \sqrt{9 + 72} - \sqrt{18 \times 8} + 6 \\ y = \sqrt{81} - \sqrt{144} + 6 \\ y = 9 - 12 + 6 \\ y = 3 \\ \\ \iff \: m _{g} = \sqrt{xy} \\ m _{g} = \sqrt{12 \times 3} \\ m _{g} = \sqrt{36} \\ m _{g} = 6$