123^2-122×124计算

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123^2-122×124计算

123^2-122×124
=123^2-(123-1)×(123+1)
=123^2-(123^2-1)
=1

123^2-122×124
=123^2-(123-1)(123+1)
=123^2-(123^2-1)
=123^2-123^2+1
=1.

123²-124×122
=123²-(123+1)×(123-1)
=123²-(123²-1)
=1