## yokie Group Title (a) What is [- sqrt(144)]? (b) What is [sqrt(- 144)]? I think it is -12, but donot know (b) 3 years ago 3 years ago

1. uyqn Group Title

$\sqrt{-144}=12i$ as it becomes imaginary if you take the root of a negative number.

b) is 12i where i is iota ...but its a complex no.

3. raheen Group Title

[- sqrt(144)] = -12

4. raheen Group Title

[sqrt(- 144)] = 12 i

5. raheen Group Title

the first one is real but the second is imaginary

6. yokie Group Title

So [sqrt(- 144)] must not be a real number?

7. penpen29 Group Title

$-\sqrt{144}=-12$$\sqrt{-144}=12i$

8. raheen Group Title

yes every sqrt(-number) = imaginary number

9. penpen29 Group Title

if you will get the nth root of a number wherein n is even,the answer is an imaginary number

10. penpen29 Group Title

given that the number inside the radical is negative