作业帮已知p=a²+3ab+b²,q=a²-3ab+b²,化简：p-[q-2p-(-p+q)]
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/25 02:35:49
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已知p=a²+3ab+b²,q=a²-3ab+b²,化简：p-[q-2p-(-p+q)]
已知p=a²+3ab+b²,q=a²-3ab+b²,化简：p-[q-2p-(-p+q)]
已知p=a²+3ab+b²,q=a²-3ab+b²,化简：p-[q-2p-(-p+q)]
p-[q-2p-(-p+q)]
=p-[q-2p+p-q]
=p-(-p)
=2p
=2a²+6ab+2b²
p-[q-2p-(-p+q)]
＝p-q+2p-p+ q
＝2p
p=a²+3ab+b²
代入，得
原式＝2(a²+3ab+b²)