Question

8- Efetue as multiplicações e divisões :
a) √2. √42 b)³√2. ³√6 c) √20. √2
d) √2. (√5 + √12) e) √3. (√7 + √2)
AGM ME AJUDA POR FAVOR

Answer 1

Oie, Td Bom?!

a)

$\sqrt{2} \times \sqrt{42}$

$\sqrt{2 \times 42}$

$\sqrt{84}$

$\sqrt{2 {}^{2} \times 21 }$

$\sqrt{2 {}^{2} } \sqrt{21}$

$2 \sqrt{21}$

b)

$\sqrt[3]{2} \times \sqrt[3]{6}$

$\sqrt[3]{2 \times 6}$

$\sqrt[3]{12}$

c)

$\sqrt{20} \times \sqrt{2}$

$\sqrt{20 \times 2}$

$\sqrt{40}$

$\sqrt{2 {}^{2} \times 10}$

$\sqrt{2 {}^{2} } \sqrt{10}$

$2 \sqrt{10}$

d)

$\sqrt{2} \times ( \sqrt{5} + \sqrt{12} )$

$\sqrt{2} \times ( \sqrt{5} + 2 \sqrt{3} )$

$\sqrt{2} \sqrt{5} + \sqrt{2} \times 2 \sqrt{3}$

$\sqrt{10} + 2 \sqrt{6}$

e)

$\sqrt{3} \times ( \sqrt{7} + \sqrt{2} )$

$\sqrt{3} \sqrt{7} + \sqrt{3} \sqrt{2}$

$\sqrt{21} + \sqrt{6}$

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