Easy Algebra Step-by-Step

Roots and Radicals 43

Exercise 3

For 1–4, fi nd the two square roots of the given number.

1. 144
   2.^25
   49
   3. 0.64
   4. 400

For 5–18, fi nd the indicated root, if possible.

5. 16


6. − 9

7.

16

25

8. 25 + 144


9. − 55 ⋅−


10. zz
    11.^3 − 125
    12. 64
    125

3

13.^30. 027
14.^3 yyyyy
15.^4625
16. −^32
243

5

17.^6 − 64
18.^70

For 19 and 20, simplify.

19. 72 20.^2
    3