Nineteen Eighty-Four is a novel.
The phrase `` two plus two equals five '' ( `` 2 + 2 = 5 '' ) is a slogan used in many different forms of media , most notably in Part One , Chapter Seven of the book 1984 by George Orwell . Nineteen Eighty-Four . Many of its terms and concepts , such as Big Brother , doublethink , thoughtcrime , Newspeak , Room 101 , telescreen , 2 + 2 = 5 , and memory hole , have entered into common use since its publication in 1949 .