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maths question, quick!!!!!!!!!!!!!!!!
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Factorize the following expression,include step 1.(x+2)^2-4(x^2-4x-12) 2.x^3-6x^2-16x+96 更新: 3.16x^3-4x-48
最佳解答:
As follows~ 圖片參考：http://i248.photobucket.com/albums/gg191/ncy_0916/maths82.jpg?t=1220349310 2008-09-03 13:00:59 補充： 16x^3-4x-48 = 16x^3-4x-54+6 = (16x^3-54)-(4x-6) = 2(8x^3-27)-2(2x-3) = 2(2x-3)(4x^2+6x+9) - 2(2x-3) = 2(2x-3)(4x^2+6x+9-1) = 2(2x-3)(4x^2+6x+8) = 4(2x-3)(2x^2+3x+4)
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