- Complex Number, Undefined fractionChoice K
$$ a^2+1=0 $$

$$ a^2=-1 $$

$$ \therefore a=±\sqrt{-1}=i $$

## Skills you are tested for:

Was this explanation helpful?

- Complex Number, Undefined fractionChoice K
$$ a^2+1=0 $$

$$ a^2=-1 $$

$$ \therefore a=±\sqrt{-1}=i $$

## Skills you are tested for:

Was this explanation helpful?

## Comments