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I just bought a new Ti84 plus when I click on mode and change "Real" to "$a+bi$" it doesn't seem to convert square root of a negative number to the complex form. I have tried it numerous times I have no idea what to do :(

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closed as off-topic by GoodDeeds, Clayton, Lord Shark the Unknown, José Carlos Santos, copper.hat Mar 2 '18 at 18:23

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question is not about mathematics, within the scope defined in the help center." – GoodDeeds, Clayton, Lord Shark the Unknown, José Carlos Santos, copper.hat
If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ I’m sorry, but I don’t think this is the right place to ask your question. Since you just bought it, I’d recommend referring to the user manual to understand how to engage and properly utilize each mode available to the calculator. $\endgroup$ – Clayton Mar 2 '18 at 18:15
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Why would you want to "convert" the square root of a negative number in terms of $i$ on a calculator? In my honest opinion, calculating the square root of a negative number in your head is better than on a calculator.

For instance, with $\sqrt{-576}$, you can input $\sqrt{576}$ into your calculator, and it will output $24$. You know $\sqrt {-1}$ as $i$, your answer would be $24i$.

I realize this isn't an answer to your question, it is just a recommendation to do a more efficient method.

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  • $\begingroup$ Except this doesn’t handle the fact that the square root is multi-valued. $\endgroup$ – Clayton Mar 2 '18 at 18:43

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