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Solving A System Of Equations - HP -15C Advanced Functions Handbook

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Section 1: Using [SOLVE I Effectively
1 i~
Keystrokes
Display
-1,000.0000
-1,100
-108.9441
-108.9441
Two larger, negative
estimates.
Negative root.
Same previous estimate.
1.6000
-08
Function value.
There is no need to search further—you have found all possible
roots. The negative root has no meaning since it is outside of the
range for which the declination approximation is valid. The graph
of the function confirms the results you have found.
-20--
Solving a System of Equations
[SOLVE| is designed to find a single variable value that satisfies a
single equation. If a problem involves a system of equations with
several variables, you may still be able to | SOLVE |to find a solution.
For some systems of equations, expressed as
., x
n
) = 0
it is possible through algebraic manipulation to eliminate all but
one variable. That is, you can use the equations to derive

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