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(√6x +2√x-1 )(√6x - 2√x-1 ) (√表示算术平方根) 把它化简
人气:435 ℃ 时间:2020-06-17 07:18:27
解答
(√6x +2√x-1 )(√6x - 2√x-1 )
=[√(6x)]^2-2^2*[√(x-1)]^2
=6x-4(x-1)
=6x-4x+4
=2x+4
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