Question

Determine a raiz quadrada.
A. √−4
B. √−9
C. √−16
D. √−25
E. √−100
Me ajudem por favor

Answer 1

Dado: √-1=i

a) $\sqrt{-4}=\sqrt{4.(-1)} =\sqrt{4} .\sqrt{-1} =2i$

b) $\sqrt{-9} =\sqrt{9.(-1)} =\sqrt{9} .\sqrt{-1} =3i$

c) $\sqrt{-16} =\sqrt{16.(-1)} =\sqrt{16} .\sqrt{-1} =4i$

d) $\sqrt{-25} =\sqrt{25.(-1)} =\sqrt{25} .\sqrt{-1} =5i$

e) $\sqrt{-100} =\sqrt{100.(-1)} =\sqrt{100} .\sqrt{-1} =10i$