因式分解:(1) 12a²b(x-y)³-4ab(y-x)² (2) (a²-4a)²+(3a-12)²
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因式分解:(1) 12a²b(x-y)³-4ab(y-x)² (2) (a²-4a)²+(3a-12)²
因式分解:(1) 12a²b(x-y)³-4ab(y-x)² (2) (a²-4a)²+(3a-12)²
因式分解:(1) 12a²b(x-y)³-4ab(y-x)² (2) (a²-4a)²+(3a-12)²
(1) 12a²b(x-y)³-4ab(y-x)²
=4ab(x-y)²(3ax-3ay-1)
(2) (a²-4a)²+(3a-12)²
=a²(a-4)²+9(a-4)²
=(a-4)²(a²+9)
你是要分解还是要合并啊
(1)
4ab(x-y)^2[3a(x-y)-1]
=4ab(x-y)^2*(3ax-3ay-1)
(2)
a^2*(a-4)^2+9(a-4)^2
=(a^2+9)(a-4)^2
(1) 12a²b(x-y)³-4ab(y-x)² =4ab(x-y)^2(3ax-3ay-1)
(2) (a²-4a)²+(3a-12)²=a^2(a-4)^2-9(a-4)^2=(a-4)^2(a-3)(a+3)