HP 35s HP 35s scientific calculator - User Guide - Page 327
Cancels Equation mode - discontinued
UPC - 000000000000
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Keys: X Display: Description: Selects Equation mode. Enters the equation. X Checksum and length. Cancels Equation mode. Now, solve the equation to find its positive and negative roots: Keys: Display: Description: X X X X _ Your initial guesses for the positive root. Selects Equation mode; displays the equation. Calculates the positive root using guesses 0 and 10. Final two estimates are the same. f(x) = 0. Your initial guesses for the negative root. Redisplays the equation. Calculates negative root using guesses 0 and -10. f(x) = 0. Certain cases require special consideration: If the function's graph has a discontinuity that crosses the x-axis, then the SOLVE operation returns a value adjacent to the discontinuity (see figure a, below). In this case, f(x) may be relatively large. More about Solving D-5