(1)2c分之bd与3ac分之4b² (2)2xy分之(x+y)²与x分之x²-y²
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![(1)2c分之bd与3ac分之4b² (2)2xy分之(x+y)²与x分之x²-y²](/uploads/image/z/1113354-18-4.jpg?t=%EF%BC%881%EF%BC%892c%E5%88%86%E4%B9%8Bbd%E4%B8%8E3ac%E5%88%86%E4%B9%8B4b%26%23178%3B+%EF%BC%882%EF%BC%892xy%E5%88%86%E4%B9%8B%EF%BC%88x%2By%EF%BC%89%26%23178%3B%E4%B8%8Ex%E5%88%86%E4%B9%8Bx%26%23178%3B-y%26%23178%3B)
(1)2c分之bd与3ac分之4b² (2)2xy分之(x+y)²与x分之x²-y²
(1)2c分之bd与3ac分之4b² (2)2xy分之(x+y)²与x分之x²-y²
(1)2c分之bd与3ac分之4b² (2)2xy分之(x+y)²与x分之x²-y²
(1)2c分之bd与3ac分之4b² 公分母是6ac
bd/2c=3abd/6ac
4b²/3ac=8b²/6ac
(2)2xy分之(x+y)²与x分之x²-y² 公分母是2xy
(x+y)²/2xy
(x²-y²)/2=xy(x²-y²)/2xy=(x³y-xy³)/2xy