① 2a(a-3)²-6a²(3-a)+8a(a-3)(共两题)① 2a(a-3)²-6a²(3-a)+8a(a-3) ② 24xy²z²(x+y-z)-32xyz(z-x-y)²+8xyz³(z-x-y)

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① 2a(a-3)²-6a²(3-a)+8a(a-3)(共两题)① 2a(a-3)²-6a²(3-a)+8a(a-3) ② 24xy²z²(x+y-z)-32xyz(z-x-y)²+8xyz³(z-x-y)
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① 2a(a-3)²-6a²(3-a)+8a(a-3)(共两题)① 2a(a-3)²-6a²(3-a)+8a(a-3) ② 24xy²z²(x+y-z)-32xyz(z-x-y)²+8xyz³(z-x-y)
① 2a(a-3)²-6a²(3-a)+8a(a-3)(共两题)
① 2a(a-3)²-6a²(3-a)+8a(a-3) ② 24xy²z²(x+y-z)-32xyz(z-x-y)²+8xyz³(z-x-y)

① 2a(a-3)²-6a²(3-a)+8a(a-3)(共两题)① 2a(a-3)²-6a²(3-a)+8a(a-3) ② 24xy²z²(x+y-z)-32xyz(z-x-y)²+8xyz³(z-x-y)
1.2a(a-3)^2-6a^2(3-a)+8a(a-3)
=(a-3)(2a(a-3)+6a^2+8a)
=(a-3)(2a^2-6a+6a^2+8a)
=(a-3)(8a^2+2a)
=2a(a-3)(4a+1)
2.24xy^2z^2(x+y-z)-32xyz(z-x-y)+8xyz^3(z-x-y)
=24xy^2z^2(x+y-z)+32xyz(x+y-z)-8xyz^3(x+y-z)
=8xyz(x+y-z)(3yz+4-z^2)

(1)=)(a-3)[2a(a-3)+6a^2+8a]=(a-3)(8a^2-2a)=2a(a-3)(a-1)

第一题答案是2a(a-3)(4a+1)
第二题答案是8xyz(x+y-z)(3yz-4x+4y+4z-z)

① 2a(a-3)²-6a²(3-a)+8a(a-3)
=10a(a-3)+6a²(a-3)
=2a(a-3)(5+3a)

② 24xy²z²(x+y-z)-32xyz(z-x-y)²+8xyz³(z-x-y)
=24xy²z²(x+y-z)+32xyz(x+y-z)²-8xyz³(x+y-z)
=8xyz(x+y-z)(3yz+4-z²)