Solve

The solve key is not programmable, but it is a powerful addition to the calculator functionality. The solve function utilizes HP Solve, a feature unique to HP calculators, which allows you to find a number for a variable that will cause a program to return a 0. This can be used to solve complex equations.

For example, if you want to solve xx-y=0.

1.:E<<I(select and edit program 2)

2.L1:hL1-L2= (HOLD)

(enter program var1var1 -var2=)

3.Press Oto exit. Store 3 into variable 2 by pressing 3:$1. Press :Eand note that Prgrm 2 is selected, as the calculator displays the program that was last edited. For verification, this program has 11 bytes, and the checksum, 199.

4.Press :(HOLD) 2to solve for variable 2. The calculator will attempt to

find what value in variable 2 would cause the program to result in 0. In this case, the result is 27.

5.Now store 10 into variable 2: 10:$2. Since Prgrm 2 was the last program selected in the program menu, you can use the SOLVE feature directly. Press

:(HOLD) 1to solve for variable 1, such that the result of the program is 0. The result this time is 2.506184..., since you stored 10 into variable 2.

6.You can verify this is correct by pressing L1:hL1=and see that 10 is returned.

Programming 87

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HP 30b Professional, 20b Consultant Financial manual L1hL1-L2= Hold, Solve
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30b Professional, 20b Consultant Financial specifications

The HP 30b Professional calculator is a versatile tool designed specifically for business professionals, engineers, and educators. This reliable calculator merges advanced technologies with user-friendly features, enabling users to perform complex calculations with ease. The HP 30b is appreciated for its robust design and functionality, making it a top choice among those who require a dependable calculating device for various applications.

One of the standout features of the HP 30b is its capability to handle both RPN (Reverse Polish Notation) and algebraic entry modes. This flexibility allows users to choose the input method that best suits their preferences, enhancing productivity and minimizing calculation errors. The calculator also boasts a large, high-resolution display that ensures clarity when navigating through calculations and results.

The HP 30b comes equipped with essential business functions that include financial calculations, cash flow analysis, and statistical functions, all of which are invaluable in professional settings. Users can seamlessly compute interest rates, perform amortization schedules, and evaluate loan payments, making it an indispensable asset for finance-oriented individuals.

Another key characteristic is its programmable functionality. The HP 30b allows users to create custom programs tailored to specific tasks, which can save time and reduce manual entry errors. This programmable capability is especially beneficial for repetitive calculations, providing a significant efficiency boost in ambiguous or multi-step operations.

The durable construction of the HP 30b ensures longevity while the compact design makes it portable and convenient for on-the-go calculations. Additionally, the calculator features an energy-efficient design, which includes a long-lasting battery life, reducing the need for frequent replacements.

With a straightforward key layout and intuitive interface, the HP 30b is designed with user experience in mind. Whether in a classroom, office, or fieldwork scenario, users can easily navigate functions and access the features they need quickly. The HP 30b Professional calculator is truly an impressive blend of technology and practicality, making it an essential tool for anyone needing reliable performance in their daily calculations.
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