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Question-193821




Question Number 193821 by leandrosriv02 last updated on 20/Jun/23
Commented by talminator2856792 last updated on 21/Jun/23
  −(a + b − 1) + a + b    = a −a + b −b +1    = 0 + 0 +1    = 1
$$\:\:−\left({a}\:+\:{b}\:−\:\mathrm{1}\right)\:+\:{a}\:+\:{b} \\ $$$$\:\:=\:{a}\:−{a}\:+\:{b}\:−{b}\:+\mathrm{1} \\ $$$$\:\:=\:\mathrm{0}\:+\:\mathrm{0}\:+\mathrm{1} \\ $$$$\:\:=\:\mathrm{1} \\ $$

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