1.(2x-1)(4x²+2x+1))2.(x-1)(x²+x)
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![1.(2x-1)(4x²+2x+1))2.(x-1)(x²+x)](/uploads/image/z/996039-63-9.jpg?t=1.%282x-1%29%284x%26%23178%3B%2B2x%2B1%29%292.%EF%BC%88x-1%29%28x%26%23178%3B%2Bx%29)
1.(2x-1)(4x²+2x+1))2.(x-1)(x²+x)
1.(2x-1)(4x²+2x+1))
2.(x-1)(x²+x)
1.(2x-1)(4x²+2x+1))2.(x-1)(x²+x)
(2x-1)(4x²+2x+1)=(2x)³-1=8x³-1
(x-1)(x²+x)=x(x-1)(x+1)=x(x²-1)=x³-x
(1)8x3-4x2+4x2-2x+2x-1=8x3-1
(2)x3-x2+x2-x=x3-x