因式分解:a^3-7a+6
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因式分解:a^3-7a+6
因式分解:a^3-7a+6
因式分解:a^3-7a+6
原式=a³-a-6a+6
=a(a+1)(a-1)-6(a-1)
=(a-1)(a²+a-6)
=(a-1)(a-2)(a+3)
a^3-7a+6
=a^3-a^2+a^2-7a+6
=a^2(a-1)+(a-6)(a-1)
=(a^2+a-6)(a-1)
=(a+3)(a-2)(a-1)