因式分解:4x-4x²-1=

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因式分解:4x-4x²-1=

因式分解:4x-4x²-1=
因式分解:4x-4x²-1=

因式分解:4x-4x²-1=
e龙葵儿,你好!
4x-4x²-1
=-(4x²-4x+1)
= -(2x-1)²

-(4x²-4x+1)
= -(2x-1)²

4x^4-2x^2+1
=4x^4+4x²+1-6x²
=(2x²+1)-(√6x)²
=(2x²+√6x+1)(2x²-√6x+1)
x²+4xy-y²
=x²+4xy+4y²-5y²
=(x+2y)²-(√5y)²
=(x+2y+√5y)(x+2y-√5y)
=[x+(2+√5)y][x+(2-√5)y]