试说明(a-1)(a²-3)+a²(a+1)-2(am³-2a-4)-a的值与a无关
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试说明(a-1)(a²-3)+a²(a+1)-2(am³-2a-4)-a的值与a无关
试说明(a-1)(a²-3)+a²(a+1)-2(am³-2a-4)-a的值与a无关
试说明(a-1)(a²-3)+a²(a+1)-2(am³-2a-4)-a的值与a无关
a3-a2-3a+3+a3+a2-2a3+4a+8-a
=(2a3-2a3)-(a2-a2)-(3a+a-4a)+3+8
=0+0+0+3+8
=11
是11,所以值与a无关
(a-1)(a²-3)+a²(a+1)-2(a³-2a-4)-a
=a³-a²-3a+3+a³+a²-2a³+4a-a
=(a³+a³-2a³)+(-a²+a²)+(-3a+4a-a)+3
=0+0+0+3
=3
所以值与a无关对...
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(a-1)(a²-3)+a²(a+1)-2(a³-2a-4)-a
=a³-a²-3a+3+a³+a²-2a³+4a-a
=(a³+a³-2a³)+(-a²+a²)+(-3a+4a-a)+3
=0+0+0+3
=3
所以值与a无关
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