Question

x³-(y-1)³

^{mình cần gấp mn giúp mình với ạ}

Answer 1

\(x^3-\left(y-1\right)^3\)

\(=\left[x-\left(y-1\right)\right]\left[x^2+x\left(y-1\right)+\left(y-1\right)^2\right]\)

\(=\left(x-y+1\right)\left[x^2+xy-x+\left(y^2-2y+1\right)\right]\)

\(=\left(x-y+1\right)\left(x^2+xy-x+y^2-2y+1\right)\)

Answer 2

x^3-(y-1)^3

=[x-(y-1)][x^2+x(y-1)+(y-1)^2]

=(x-y+1)(x^2+xy-x+y^2-2y+1)