math
posted by James on .
How would I come about to the solution and what the answers to the question so I can help my son with his school work?
1.Check all the answers that are square roots of 36
a. 36^1/2
b.(36)^1/2
c.9
d.6
e.6
f. √36
2.)Which answers are equal to the expression 2 x √9
a.√18
b.18
c.6
d.6
e.36
f.√36
3.)Which answers are equal to the expression √9 / √36
a. 3/6
b.√9/36
c.√1 / √4
d.4
e.√1/4
f.1/2
5.)Which answers are equal to the expression √16 x √25
a.√41
b.√16 x 25
c.(16 x 25)^1/2
d.20
e.400
f.√25 x √16

The sure way is to do them backwards and see how they come out.
For example:
(36)^(1/2) * (36)^1/2 = + 36^1 so yes
6 * 6 = +36 so yes
9*9 = 81 so no