已知整式A与多项式2a²-3ab+b²的和等于2a²-5ab求整式A
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![已知整式A与多项式2a²-3ab+b²的和等于2a²-5ab求整式A](/uploads/image/z/1685234-2-4.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B4%E5%BC%8FA%E4%B8%8E%E5%A4%9A%E9%A1%B9%E5%BC%8F2a%26%23178%3B-3ab%2Bb%26%23178%3B%E7%9A%84%E5%92%8C%E7%AD%89%E4%BA%8E2a%26%23178%3B-5ab%E6%B1%82%E6%95%B4%E5%BC%8FA)
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已知整式A与多项式2a²-3ab+b²的和等于2a²-5ab求整式A
已知整式A与多项式2a²-3ab+b²的和等于2a²-5ab求整式A
已知整式A与多项式2a²-3ab+b²的和等于2a²-5ab求整式A
A+2a²-3ab+b²=2a²-5ab
A=2a²-5ab-(2a²-3ab+b²)
=2a²-5ab-2a²+3ab-b²
=-2ab-b²