已知a³﹢a²b=-2,a²b﹢b³=5,求a³﹢2a²b﹢b³的值.
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已知a³﹢a²b=-2,a²b﹢b³=5,求a³﹢2a²b﹢b³的值.
已知a³﹢a²b=-2,a²b﹢b³=5,求a³﹢2a²b﹢b³的值.
已知a³﹢a²b=-2,a²b﹢b³=5,求a³﹢2a²b﹢b³的值.
a³﹢2a²b﹢b³
=a³﹢a²b+a²b﹢b³
=(a³﹢a²b)+(a²b﹢b³)
=-2+5
=3
a³+2a²b+b³
=(a³+a²b)+(a²b+b³)
=-2+5
=3