4ab(a+b)²-6a²b(a+b)
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4ab(a+b)²
-
6a²b(a+b)
=2ab(a+b)(2a+2b-3a)
=-2ab(a+b)(a-2b)
(2)(x+y)²
(x-y)+(x+y)(x-y)²
=(x+y+(x-y)(x+y+x-y)
=2x(x+y)(x-y)
(3)2a(a-3)²
-6a²(3-a)+8a(a-3)
=2a(a-3)²+6a²(a-3)+8a(a-3)
=2a(a-3)(a-3+3a+4)
=2a(a-3)(4a+1)
(4)24xy²z²(x+y-z)-32xyz(z-x-y)²
+8xyz
³
(z-x-y)
=24xy²z²(x+y-z)-32xyz(x+y-z)²
-8xyz
³
(x+y-z)
=8xyz(x+y-z)(3yz-4x范长顿短塥的舵痊罚花-4y+4z-z²)
-
6a²b(a+b)
=2ab(a+b)(2a+2b-3a)
=-2ab(a+b)(a-2b)
(2)(x+y)²
(x-y)+(x+y)(x-y)²
=(x+y+(x-y)(x+y+x-y)
=2x(x+y)(x-y)
(3)2a(a-3)²
-6a²(3-a)+8a(a-3)
=2a(a-3)²+6a²(a-3)+8a(a-3)
=2a(a-3)(a-3+3a+4)
=2a(a-3)(4a+1)
(4)24xy²z²(x+y-z)-32xyz(z-x-y)²
+8xyz
³
(z-x-y)
=24xy²z²(x+y-z)-32xyz(x+y-z)²
-8xyz
³
(x+y-z)
=8xyz(x+y-z)(3yz-4x范长顿短塥的舵痊罚花-4y+4z-z²)
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