Collect

Collect[expr,x]
collects together terms involving the same powers of objects matching x.

Collect[expr,{x1,x2,}]
collects together terms that involve the same powers of objects matching , , .

Collect[expr,var,h]
applies h to the expression that forms the coefficient of each term obtained.

Details and OptionsDetails and Options

  • Collect[expr,x] effectively writes expr as a polynomial in x or a fractional power of x.
  • Collect[expr,x,Simplify] can be used to simplify each coefficient separately.
  • Collect automatically threads over lists in expr, as well as equations, inequalities and logic functions.
Introduced in 1988
(1.0)
| Updated in 2007
(6.0)