Question

calcule

a) 7.√¯81

b) √¯100 + √¯49

C) o Triplo da raiz quadrada de 400.

Answer 1

a) 7$\sqrt{81}$

$\sqrt{81}$= 9
7 × 9= 63

b)$\sqrt{100} + \sqrt{49}$

$\sqrt{100} = 10$
$\sqrt{49} = 7$
7 + 10 = 17

c)O triplo da $\sqrt{400}$

$\sqrt{400} = 4 \sqrt{10}$
3 × 4√10 = 12√10