The Expand Command

The Expand command is used to change an expression to an expanded form. For example, Expand applied to the expression x*(y + 1) give x* y + x. This command typically just modifies the highlighted term. The keystroke for the Expand command is the "e" key.

In addition to simple expansions of algebraic expressions, for example:

the expand command works on a number of other expressions, including:
  • Roots:

  • Absolute value:

  • Summation:

    (in this case, the expand command has been used several times in a row)

  • Trig functions:

  • Derivatives and integrals: