Question

How do you simplify `2sqrt121`?

Answer 1

`= 22`

Explanation:

`2 sqrt (121)`

• We simplify `121` by prime factorisation (expressing a number as a product of its prime factors).

`121 = 11 *11 = color(green)( 11^2`

`2 color(green)(sqrt (121)) = 2 * sqrtcolor(green)(11^2`

`= 2 *11`

`= 22`