Question 206619
It depends if your book/teacher wants the exact answer or an approximate
1. To find the approximate answer simply plug it into a calculator
- {{{sqrt(128) = 11.3137}}}
2. To find the exact answer is a little more complicated
a. First see if 128 is divisible by any perfect squares (eg. 4,9,16,25... etc)
- {{{sqrt(128)}}}
b. Since it is divisible by 64 then simplify
- {{{sqrt((64)*(2))}}}
- {{{sqrt(64)*sqrt(2)}}}
- {{{8*sqrt(2)}}}
c. And there's your final answer
- {{{8sqrt(2)}}}
3. So depending on what answer your book/teacher wants, your answers will be
- {{{11.3137}}} or {{{8sqrt(2)}}}