Finn is playing a game. His goal is to create the expression x+1x+1, starting from xx. However, he has only two options:

  • a 1−1- button, which subtracts the current expression from 11; and
  • a −- button, which multiplies the current expression by −1-1.

How can he achieve his goal? Select all possibilities below.

Choose all correct answers

Type a concept, like “slope” or “photosynthesis”.

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