Question

How do y simplify `sqrt648`?

Answer 1

`18sqrt2`

Explanation:

Write 648 as the product of its prime factors first:

`sqrt648 = sqrt(2xx2xx2xx3xx3xx3xx3xx3)`

=`sqrt(2 xx 2^2 xx 3^4)" "` group even powers where possible.

=`2xx 3^2 sqrt2`

= `18sqrt2`