Question

factorise x³-2x²-x+2 by splitting the middle term​

Answer 1

Answer:

${x}^{3} - 2{x}^{2} - x + 2 \\ = {x}^{2} \times (x - 2) - (x - 2) \\ = (x - 2) \times ( {x}^{2} - 1) \\ = (x - 2) \: (x - 1) \: (x + 1)$