如果a²+b²=5,那么代数式(3a²-2ab-b²)-(a²-2ab-3b²)的值
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![如果a²+b²=5,那么代数式(3a²-2ab-b²)-(a²-2ab-3b²)的值](/uploads/image/z/1998640-64-0.jpg?t=%E5%A6%82%E6%9E%9Ca%26%23178%3B%EF%BC%8Bb%26%23178%3B%3D5%2C%E9%82%A3%E4%B9%88%E4%BB%A3%E6%95%B0%E5%BC%8F%EF%BC%883a%26%23178%3B-2ab-b%26%23178%3B%EF%BC%89-%EF%BC%88a%26%23178%3B-2ab-3b%26%23178%3B%EF%BC%89%E7%9A%84%E5%80%BC)
如果a²+b²=5,那么代数式(3a²-2ab-b²)-(a²-2ab-3b²)的值
如果a²+b²=5,那么代数式(3a²-2ab-b²)-(a²-2ab-3b²)的值
如果a²+b²=5,那么代数式(3a²-2ab-b²)-(a²-2ab-3b²)的值
3a²-2ab-b²-a²+2ab+3b²
=2(a²+b²)
=2x5
=10