# LCM help

• LCM
• Input help

On this screen you can find the Least Common Multiple (LCM) of several terms. If you need to perform a different operation, press the appropriate operation.

## How can I enter multiple terms?

Use , or Enter key to separate terms.

## I need to find an LCD, but I can only find an LCM operation. How do I do that?

The LCM (Least Common Multiple) and the LCD (Least Common Denominator) are exactly the same – just make sure you enter only denominators (not whole fractions), separated by , or Enter key.

## Why can’t Algebrator find the LCM of my expressions?

Keep in mind that only the LCM (Least Common Denominator) of terms or integers can be found. You cannot apply the LCM operation to sums such as xy + 2x. However, you can apply it to xy,2x.

## How do I enter an exponent?

Enter the base and then press the power key ^, to enter the exponent. Once you are done entering the exponent, press or Right arrow key to return the cursor to the base.

More than 90% of the problems found in a typical algebra textbook can be entered using the default keyboard layout accessible via the Keyboard. If you need to enter a different variable, a function, or a special constant (such as π), press the A or F keys to access alternate keyboards. Once you press an alternate keyboard key, the keyboard reverts to the primary keyboard.

The key remembers the last used variable. This will speed up the problem entry since you don't have to repeatedly access the alternate keyboard layout for frequently used symbols.

The left and right arrow keys allow you to move through the expression, one character at the time. The right arrow key can also be used to 'exit' exponents, denominators, and parentheses.

Always be aware of your cursor location. For example, if you type in a^2 to enter the power a2, make sure to 'exit' the exponent before adding another term (e.g. a2+2a). The exponent is exited via or Right arrow key. If you don't, then your expression will look like this: a2+2a.

When you press the ( key, both left and right parenthesis are created, and the cursor is placed inside them. Once you are finished typing the parenthesized expression, use or Right arrow key to exit the parentheses.a The same concept applies to the absolute value key.

In order to use the subscript key _, you already need to have the variable (without subscript) typed in. The same goes for the power key ^. In contrast, if you want an expression under the root, first press the root key , and then enter the expression.