Powers are exponential expressions. (See also exponential function and logarithmic function.) Examples: Powers: , 23, 4-2, Bases of above: , 2, 4, - Exponents of above: - is read as a to the -th power. Some special powers: 2 the square of or squared 3 the cube of or cubed ( = ) the square root of ( = ) the cube root of 0 = 1 for all Rules of powers: - =- = = + == - = () = xy() = 12