Question

State, with reason, the following are surds or not :$\sqrt{180}$

Answer 1

$\sqrt{180}$

$=\sqrt{9\times 2\times 10}$

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

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

$6\sqrt{5}$

since, it remain in root form

so, it is surd