a^4-6a^2+8还有2y^2-10y-12
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a^4-6a^2+8还有2y^2-10y-12
a^4-6a^2+8
还有2y^2-10y-12
a^4-6a^2+8还有2y^2-10y-12
a^4-6a^2+8
=(a²-2)(a²-4)
=(a²-2)(a+2)(a-2)
2y^2-10y-12
=2(y²-5y-6)
=2(y-6)(y+1)
2y^2-10y-12
=2*(y^2-5y-6)
=2*(y+1)*(y-6)
a^4-6a^2+8还有2y^2-10y-12
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