SOLUTION: I need steps to solve following to understand 1:evaluate the following square roots : Square root (16) And Square root 81 2) expand each notation and find its val

Algebra ->  Radicals -> SOLUTION: I need steps to solve following to understand 1:evaluate the following square roots : Square root (16) And Square root 81 2) expand each notation and find its val      Log On


   

Question 895950: I need steps to solve following to understand
1:evaluate the following square roots :
Square root (16)

And
Square root 81

2) expand each notation and find its value
5^3
My answer 5*5*5=125
20^2
My answer 20*20=400
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
# 1

Since 4^2 = 4*4 = 16

this means sqrt(16) = 4

The square root undoes what squaring does. It's like how division undoes multiplication


Note: sqrt stands for "square root"

-------------------------------------------

5^2 = 25

So sqrt(25) = 5

===================================================================

# 2

5^3 = 5*5*5 = 125 is correct

So is 20^2 = 20*20 = 400

Nice job on this problem.