Question

Determine as raízes de:
A) √-4=
B) √25=
C)√0=
D)√-25=
E)√81=
F)-√81=
G)√36=
H)√400=
I)√169=
J)√900=

Answer 1

Não existe,, 5,0,nao existe, 9,-9,6,20,13,30

Answer 2

a) 2i
√(- 4) = √4 . √(- 1) = 2 . i = 2i
√(- 4) ∉ R

b) 5
√25 = √5² = 5

c) 0
√0 = 0² = 0

d) 5i
√(- 25) = √25 . √(- 1) = 5 . i = 5i
√(- 25) ∉ R

e) 9
√81 = √9² = 9

f) - 9
- √81 = - √9² = - 9

g) 6
√36 = √6² = 6

h) 20
√400 = √20² = 20

i) 13
√169 = √13² = 13

j) 30
√900 = √30² = 30