Question

Referring to the figure, evaluate the expression shown.

Answer 1

which figure?

Answer 2

http://www.ppstest2.com/images2/AL9001.jpg

Answer 3

is it just
\[\sqrt{81}\]

Answer 4

yes :(

Answer 5

ok, can u factor 81?

Answer 6

what?

Answer 7

ok,did u know 81 is the square of what number?
or what number when multiplied by itself gives 81??

Answer 8

9

Answer 9

right so i can write \[9^2 = 81\]
right?

Answer 10

yea?

Answer 11

is that the answer

Answer 12

ok,so i will write
\[\sqrt{81}=\sqrt{9^2}\]
now knowing that \[\sqrt{a^2}=a\] or \[\sqrt{a^2}=-a\]
i will write \[\sqrt {81} = 9 or -9\]

Answer 13

ok?

Answer 14

yes,thats your answer 9 or -9

Answer 15

ok thankkks
:)