四道初一计算题 (1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(3)(3x²y-2xy+2xy²)÷(xy)(4
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![四道初一计算题 (1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(3)(3x²y-2xy+2xy²)÷(xy)(4](/uploads/image/z/1261496-56-6.jpg?t=%E5%9B%9B%E9%81%93%E5%88%9D%E4%B8%80%E8%AE%A1%E7%AE%97%E9%A2%98+%EF%BC%881%EF%BC%89%288x%26%23179%3B-12x%26%23178%3B%2B16x%29%C3%B7%28-4x%29%EF%BC%882%EF%BC%89%5B3%EF%BC%88m%2Bn%29%28m-n%29%2B%28m-n%29%26%23178%3B-2nm-n%29%5D%C3%B7%EF%BC%884m%EF%BC%89%EF%BC%881%EF%BC%89%288x%26%23179%3B-12x%26%23178%3B%2B16x%29%C3%B7%28-4x%29%EF%BC%882%EF%BC%89%5B3%EF%BC%88m%2Bn%29%28m-n%29%2B%28m-n%29%26%23178%3B-2nm-n%29%5D%C3%B7%EF%BC%884m%EF%BC%89%EF%BC%883%EF%BC%89%EF%BC%883x%26%23178%3By-2xy%2B2xy%26%23178%3B%EF%BC%89%C3%B7%EF%BC%88xy%EF%BC%89%EF%BC%884)
四道初一计算题 (1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(3)(3x²y-2xy+2xy²)÷(xy)(4
四道初一计算题 (1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)
(1)(8x³-12x²+16x)÷(-4x)
(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)
(3)(3x²y-2xy+2xy²)÷(xy)
(4)[(a+b)(a-b)-(a+b)²]÷(a+b)
四道初一计算题 (1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(1)(8x³-12x²+16x)÷(-4x)(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)(3)(3x²y-2xy+2xy²)÷(xy)(4
(1)(8x³-12x²+16x)÷(-4x)
=-2x²+3x-4
(2)[3(m+n)(m-n)+(m-n)²-2nm-n)]÷(4m)
=(3m²-3n²+m²-2mn+n²-2nm-n)÷(4m)
=(4m²-2n²-4mn-n)÷(4m)
=4-n²/(2m)-4n-n/(4m) 题目有误?
(3)(3x²y-2xy+2xy²)÷(xy)
=3x-2+2y
(4)[(a+b)(a-b)-(a+b)²]÷(a+b)
=(a-b)-(a+b)
=a-b-a-b
=-2b