
因式分解:x²-16 ; a³-8a ;2x²-10x ;a³-a
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x²-16 ;
=(x-4)(x+4)
a³-8a ;
=a(a²-8)
2x²-10x ;
=2x(x-5)
a³-a
=a(a²-1)
=a(a-1)(a+1)
=(x-4)(x+4)
a³-8a ;
=a(a²-8)
2x²-10x ;
=2x(x-5)
a³-a
=a(a²-1)
=a(a-1)(a+1)
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