Easy Algebra Step-by-Step

34 Easy Algebra Step-by-Step

b.^4

9

Step 1. Find the principal square root of

4

9

.

2

3

2

3

4

9

⋅=, so

2

3

is the principal square root of

4

9

.

Step 2. Write the two square roots of

4

9

.

2

3

and −

2

3

are the two square roots of

4

9

.

c. 049

Step 1. Find the principal square root of 0.49.

() 07. 7 () 007. = 04. 9 , so 0.7 is the principal square root of 0.49.

Step 2. Write the two square roots of 0.49.

0.7 and − 07. are the two square roots of 0.49.

d. 11

Step 1. Find the principal square root of 11.

11 is the principal square root of 11.

Step 2. Write the two square roots of 11.

11 and − 11 are the two square roots of 11.

Problem Find the indicated root.

a. 81

b. 100

c.^4

25

d. 30

e. 916

Because 11 is not a perfect square,

you indicate the square root.