4b-4ab+a²b
=b(a²-4a+4)
=b(a-2)²
请点击下面的【选为满意回答】按钮,（x²）³÷x五次方+（-x²）·（-x²）÷x³，其中x=1???x²）³÷x五次方+（-x²）·（-x²）÷x³=x^6÷x^5+x^4÷x^3=x+x=2x采纳吧
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