Question

a
$\sqrt{400}$
b
$\sqrt{900}$
c
$\sqrt{441}$
​

Answer 1

a) $\sqrt{400} = \sqrt{2^2.2^2.5^2} = 2.2.5 = 20$

b)$\sqrt{900} = \sqrt{3^2.5^2.2^2} = 3.5.2 = 30$

c)$\sqrt{441} = \sqrt{3^2.7^2} = 3.7 = 21$