因式分解:-a³-4a²+12a=
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因式分解:-a³-4a²+12a=
-a³-4a²+12a
=-a(a²+4a-12)
=-a(a+6)(a-2)
-a³-4a²+12a
=-a(a²+4a-12)
=-a(a+6)(a-2)
-a³-4a²+12a=﹣a﹙a²+4a-12﹚=﹣a﹙a+6﹚﹙a-2﹚
因式分解:-a³-4a²+12a=
-a³-4a²+12a
=-a(a²+4a-12)
=-a(a+6)(a-2)
-a³-4a²+12a
=-a(a²+4a-12)
=-a(a+6)(a-2)
-a³-4a²+12a=﹣a﹙a²+4a-12﹚=﹣a﹙a+6﹚﹙a-2﹚