root of a quadratic equation

[Thomas Klemm]

(08-22-2015 09:41 AM)tigger Wrote:  Is there a sign for SQRT on this page?

• \v/ (tri-code)
• √ (unicode)
• \(\sqrt{}\) (LaTeX)
  

Quote:When I punched the keys in the calculator itself made a blank between the - and the 2. How could I know that the calculator made this mistake?
Does the HP always makes mistakes like this?
How can I avoid this kind of mistakes?

To enter -2 you have to punch the [2] and then the [±] key.

Cheers
Thomas