Question

raiz quadrada
$\sqrt{81.121}$
$\sqrt{144.225}$
$\sqrt{100.361}$
$\sqrt{400.49}$
​

Answer 1

a)

$9 \times 11 = 99$

b)

$12 \times 15 = 180$

c)

$10 \times 19 = 190$

d)

$20 \times 7 = 140$

Answer 2

Oi...

$a)~\sqrt{81.121}~=~\sqrt{9^2~.~11^2}~=~9~.11~=~99$

$b)~\sqrt{144.225}~=~\sqrt{12^2~.~15^2}~=~12.15~=~180$

$c)~\sqrt{100~.~361}~=~\sqrt{10^2~.~19^2}~=~10~.~19~=~190$

$d)~\sqrt{400~.~49}~=~\sqrt{20^2~.~7^2}~=~20~.~7~=~140$

Espero ter ajudado.