(√6x +2√x-1 )(√6x - 2√x-1 ) (√表示算术平方根) 把它化简
问题描述:
(√6x +2√x-1 )(√6x - 2√x-1 ) (√表示算术平方根) 把它化简
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