(x+2)(4x-2)怎么算,
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(x+2)(4x-2)怎么算,
(x+2)(4x-2)怎么算,
(x+2)(4x-2)怎么算,
(x+2)(4x-2)
=x^2-2x+8x-4
=x^2+6x-4
﹙x+2﹚﹙4x-2﹚=4x²+8x-2x-4=4x²+6x-4
运用乘法运算发则即可!
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