分解因式:1、-4a的3次方b²+8a²b² 2、9(a+b)²-4(a-b)²3、(x²+y²)²-4x²y²
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分解因式:1、-4a的3次方b²+8a²b² 2、9(a+b)²-4(a-b)²3、(x²+y²)²-4x²y²
分解因式:1、-4a的3次方b²+8a²b² 2、9(a+b)²-4(a-b)²
3、(x²+y²)²-4x²y²
分解因式:1、-4a的3次方b²+8a²b² 2、9(a+b)²-4(a-b)²3、(x²+y²)²-4x²y²
-4a的3次方b²+8a²b²
=-4a²b²(a-2)
9(a+b)²-4(a-b)²
=(3a+3b+2a-2b)(3a+3b-2a+2b)
=(5a+b)(a+5b)
(x²+y²)²-4x²y²
=(x²+y²+2xy)(x²+y²-2xy)
=(x+y)²(x-y)²