计算:3(a²﹣2ab²)﹣(a²b+3ab²)
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计算:3(a²﹣2ab²)﹣(a²b+3ab²)
计算:3(a²﹣2ab²)﹣(a²b+3ab²)
计算:3(a²﹣2ab²)﹣(a²b+3ab²)
3(a²﹣2ab²)﹣(a²b+3ab²)
=3a²﹣6ab²﹣a²b-3ab²
=3a²﹣9ab²﹣a²b
题没错咩?
3a的平方-a的平方b-3ab的平方