1、分解因式(4a²+1)²-16a² 2、分解因式4xy²-4x²y-y³
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![1、分解因式(4a²+1)²-16a² 2、分解因式4xy²-4x²y-y³](/uploads/image/z/2744891-35-1.jpg?t=1%E3%80%81%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%EF%BC%884a%26%23178%3B%2B1%EF%BC%89%26%23178%3B-16a%26%23178%3B+2%E3%80%81%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F4xy%26%23178%3B-4x%26%23178%3By-y%26%23179%3B)
1、分解因式(4a²+1)²-16a² 2、分解因式4xy²-4x²y-y³
1、分解因式(4a²+1)²-16a² 2、分解因式4xy²-4x²y-y³
1、分解因式(4a²+1)²-16a² 2、分解因式4xy²-4x²y-y³
(4a²+1)²-16a²
=[(4a^2+1)+4a][(4a^2+1)-4a]
=(4a^2+4a+1)(4a^2-4a+1)
=(2a+1)^2*(2a-1)^2
4xy²-4x²y-y³
=-y(4x^2-4xy+y^2)
=-y(2x-y)^2
用平方差公式啊。
(4a²+1)²-16a²
=(4a²+1+4a)(4a²+1-4a)
=(2a+1)²(-2a+1)²
4xy²-4x²y-y³
=y(4xy-4x²-y²)
=-y(4x²-4xy+y²)
=-y(2x-y)²2