How 1 equals -1

A funny thing I saw the other day…

(1 – 0)2 = (0 – 1)2  //which is true, then adds square roots on both sides

(1 – 0)2 = √(0 – 1)2  //which again is true… extracting the square roots

1 – 0 = 0 – 1  //forgetting the modulus

1 = –1

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+ 38 = 44