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• Identical expressions

• - one - sqrt(two) = zero
• minus 1 minus square root of (2) equally 0
• minus one minus square root of (two) equally zero
• -1 - √(2) = 0
• -1 - sqrt2 = 0

• Similar expressions

• -1 + sqrt(2) = 0
• 1 - sqrt(2) = 0