[(a+b)²-4ab]÷(a-b)² (a²-b²)÷(a+b) (a4-b4)÷(a2+b2)÷(a+b) 利用乘法公式计算
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![[(a+b)²-4ab]÷(a-b)² (a²-b²)÷(a+b) (a4-b4)÷(a2+b2)÷(a+b) 利用乘法公式计算](/uploads/image/z/7138232-8-2.jpg?t=%5B%28a%2Bb%29%26%23178%3B-4ab%5D%C3%B7%28a-b%29%26%23178%3B+%EF%BC%88a%26%23178%3B-b%26%23178%3B%29%C3%B7%EF%BC%88a%2Bb%EF%BC%89+%28a4-b4%29%C3%B7%28a2%2Bb2%29%C3%B7%28a%2Bb%29+%E5%88%A9%E7%94%A8%E4%B9%98%E6%B3%95%E5%85%AC%E5%BC%8F%E8%AE%A1%E7%AE%97)
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[(a+b)²-4ab]÷(a-b)² (a²-b²)÷(a+b) (a4-b4)÷(a2+b2)÷(a+b) 利用乘法公式计算
[(a+b)²-4ab]÷(a-b)² (a²-b²)÷(a+b) (a4-b4)÷(a2+b2)÷(a+b) 利用乘法公式计算
[(a+b)²-4ab]÷(a-b)² (a²-b²)÷(a+b) (a4-b4)÷(a2+b2)÷(a+b) 利用乘法公式计算
[(a+b)²-4ab]÷(a-b)²
=(a² +2ab+b² -4ab)÷(a-b)²
=(a² -2ab+b² )÷(a-b)²
=(a-b)² ÷(a-b)²
=1
(a²-b²)÷(a+b)
=(a+b)(a-b)÷(a+b)
=a-b
(a4-b4)÷(a2+b2)÷(a+b)
=(a²+b²)(a²-b²)÷(a²+b²)÷(a-b)
=(a²-b²)÷(a+b)
=(a+b)(a-b)÷(a+b)
=a-b