因式分解 a^3-6a^2-7a

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因式分解 a^3-6a^2-7a

因式分解 a^3-6a^2-7a
因式分解 a^3-6a^2-7a

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

a^3-6a^2-7a=a(a^2-6a-7)=a(a-7)(a+1)

a*(a+1)*(a-7)

a^3-6a^2-7a
=a(a^2-6a-7)
=a(a-7)(a+1)

a³-6a²-7a=a(a²-6a-7)=a(a+1)(a-7)

=a(a^2-6a-7)=a(a-7)(a+1)

(a^2+a)(a-7)

最佳答案;a(a-7)(a+1)

-6a^2+7a+5
=-(6a^2-7a-5)
=(2a+1)(3a-5)
(x^2-x)^2-(x^2-x)-2
=(x^2-x-2)(x^2-x+2)
=(x-2)(x+1)(x^2-x+2)
4x^2-x-3
=(4x+3)(x-1)
3x^2+2ax-a^2
=(3x-a)(x+a)

=a(a^2-6a-7)
1 1
1 -7 …………【十字相乘】
=a(a+1)(a-7)

a^3-6a^2-7a
=a*(a^2-6a-7)
=a(a-7)(a+1)