negative number raised to even power

[Thomas Radtke]

(04-26-2015 12:47 PM)rprosperi Wrote:  ...and so I assume all HP algebraic machines (Pioneers at least) will behave the same way.

Are you using the +/- key? If so, a negative number is placed on the stack, and your result doesn't make me wonder.

If I type - 2 ^2 into my 10BII+ (initial value displayed is zero), it returns -4. Same with the 17BII in ALG mode..