SOLUTION: what is the square root of of 128

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Question 206619: what is the square root of of 128

Answer by Targetweek(62) About Me  (Show Source):
You can put this solution on YOUR website!
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%28128%29+=+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%28128%29
b. Since it is divisible by 64 then simplify
- sqrt%28%2864%29%2A%282%29%29
- sqrt%2864%29%2Asqrt%282%29
- 8%2Asqrt%282%29
c. And there's your final answer
- 8sqrt%282%29
3. So depending on what answer your book/teacher wants, your answers will be
- 11.3137 or 8sqrt%282%29