Question

Referring to the figure, evaluate the expression shown.
http://www.ppstest2.com/images2/AL9001.jpg

Answer 1

\[\sqrt{81}= x\]
So what times itself yields 81?

Answer 2

yup what he said

8*8=64
10*10=100 so answer is between 8 and 10

Answer 3

i know its nine
but n

Answer 4

what

Answer 5

nine what?

Answer 6

just 9 :)

Answer 7

the way to think of sqrt is as an inverse

like
- to the +

/ to the *

squared has the sqrt()

Answer 8

are you sure

Answer 9

yup answer is just 9

Answer 10

Well, there is technically one more answer. What is -9 times itself?
Depending on your course and professor, it may be a good idea to write\[\pm9\]and yes, this can be very important depending on what you are doing.