# Using Parentheses; Absolute Value Function; Squares And Square Roots - HP 48gII User Manual

Graphing calculator.

## Using parentheses

Parentheses can be used to group operations, as well as to enclose arguments
of functions. The parentheses are available through the keystroke
combination „Ü. Parentheses are always entered in pairs. For
example, to calculate (5+3.2)/(7-2.2):
In ALG mode:
„Ü5+3.2™/„Ü7-2.2`
In RPN mode, you do not need the parenthesis, calculation is done directly on
the stack:
5`3.2`+7`2.2`-/
In RPN mode, typing the expression between quotes will allow you to enter
the expression like in algebraic mode:
³„Ü5+3.2™/
„Ü7-2.2`µ
For both, ALG and RPN modes, using the Equation Writer:
‚O5+3.2™/7-2.2
The expression can be evaluated within the Equation writer, by using:
————@EVAL@ or, ‚—@EVAL@

### Absolute value function

The absolute value function, ABS, is available through the keystroke
combination: „Ê. When calculating in the stack in ALG mode, enter
the function before the argument, e.g., „Ê \2.32`
In RPN mode, enter the number first, then the function, e.g.,

### Squares and square roots

The square function, SQ, is available through the keystroke combination:
„º. When calculating in the stack in ALG mode, enter the function
before the argument, e.g., „º\2.3`
4.2#2.5 *
2.3#4.5 /
2.32\„Ê
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