HP-45 Application Book (Not getting Correct Answer))

[Thomas Klemm]

(06-28-2024 10:18 PM)Namir Wrote:  

Code:

49 RCL "D"
50 SQRT
51 RCL "Q"
52 2
53 ÷
54 +
55 +/-
56 3
57 1/X
58 Y↑X
59 STO "B"

So, what am I doing wrong?

While calculating B in line 56, the x-value is negative.
Calculating the cubic root returns the principal value.
This is a complex number.

What you want to calculate instead is the negative of the cubic root of the negative value.

This is handled in the HP-45 Application Book.