Question

1/125x^3 - 1. tính nhanh ạ mng giúp mình với tính hoài ko ra

Answer 1

\(=\dfrac{1}{\left(5x-1\right)\left(25x^2+5x+1\right)}\)

Answer 2

\(\dfrac{1}{125}x^3-1=\left(\dfrac{1}{5}x-1\right)\left(\dfrac{1}{25}x^2+\dfrac{1}{5}x+1\right)\)

Answer 3

`1/125 x^3 -1 = (1/5 x)^3 -1^3=(1/5 x-1)(1/25 x^2 +1/5 x +1)`