User:Satori/proof
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Multiplying by two:
Squaring both sides:
Simplified:
Multiplying by four:
Subtracting eight and multiplying by negative one:
Factoring a two from the right side and representing as the square root of four:
Multiplying by two:
Squaring both sides:
Simplified:
Multiplying by four:
Subtracting eight and multiplying by negative one:
Factoring a two from the right side and representing as the square root of four: