Question

1 calcule a 4√16 por decomposição.
2 calcule √121 + √144 =?
3 calcule 3√8 x 3√64 =?
4 calcule √64 - 3√125 =?

Answer 1

Olá,

1)

$\sqrt[4]{16}$

$= \sqrt[4]{ {2}^{4} } = 2$

2)

$\sqrt{121} + \sqrt{144}$

$= \sqrt{ {11}^{ 2} } + \sqrt{ {12}^{2} }$

$= 11 + 12$

$= 23$

3)

$\sqrt[3]{8} \times \sqrt[3]{4}$

$= \sqrt[3]{ {2}^{3} } \times \sqrt[3]{ {4}^{3} }$

$= 2 \times 4$

$= 8$

$\sqrt{64} - \sqrt[3]{125}$

$= \sqrt{ {8}^{2} } - \sqrt[3]{ {5}^{3} }$

$= 8 - 5$

$= 3$