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求答案!速度。
求答案!速度。(x-5)(x-2)(x-1)(2y+3)(y+1)(3y-1)(5x+1)(2x-1)(2x-3)(y+3)(y+1)2(x+2)3(2w-3)3...
求答案!速度。(x - 5)(x - 2)(x - 1)
(2y + 3)(y + 1)(3y - 1)
(5x + 1)(2x - 1)(2x - 3)
(y + 3)(y + 1)2
(x + 2)3
(2w - 3)3 展开
(2y + 3)(y + 1)(3y - 1)
(5x + 1)(2x - 1)(2x - 3)
(y + 3)(y + 1)2
(x + 2)3
(2w - 3)3 展开
2个回答
2017-05-22 · 知道合伙人教育行家
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(x - 5)(x - 2)(x - 1) = (x2 - 7x + 10)(x - 1) = x3 - 8x2 + 17x - 10
(2y + 3)(y + 1)(3y - 1) = (2y2 + 5y + 3)(y + 1) = 2y3 + 7y2 + 8一+ 3
(5x + 1)(2x - 1)(2x - 3) = (10x2 - 3x - 1)(2x - 3) = 20x3 - 30x2 + 7x + 3
(y + 3)(y + 1)2 = (y + 3)(y2 + 2y + 1) = y3 + 5y2 + 7y + 3
(x + 2)3 = (x + 2)(x2 + 2x + 1) = x3 + 4x2 + 5x + 2
(2w - 3)3 = (2w - 3)(4w2 - 12w + 9) = 8w3 - 36w2 + 54w - 27
(2y + 3)(y + 1)(3y - 1) = (2y2 + 5y + 3)(y + 1) = 2y3 + 7y2 + 8一+ 3
(5x + 1)(2x - 1)(2x - 3) = (10x2 - 3x - 1)(2x - 3) = 20x3 - 30x2 + 7x + 3
(y + 3)(y + 1)2 = (y + 3)(y2 + 2y + 1) = y3 + 5y2 + 7y + 3
(x + 2)3 = (x + 2)(x2 + 2x + 1) = x3 + 4x2 + 5x + 2
(2w - 3)3 = (2w - 3)(4w2 - 12w + 9) = 8w3 - 36w2 + 54w - 27
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