Question

5. Factorise :
(i) x3 - 2x² - x + 2​

Answer 1

Step-by-step explanation:

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

Answer 2

Question:

factorise $x^{3} -2x^{2} -x + 2$

Step-by-step explanation:

$x^{2} [x-2] - 1[x-2]=0$

$[x^{2}-1] [x-2]=0$

so here

$x^{2} -1=0$

or

$x-2 =0$

so now $x = \sqrt{1}$ or $x=2$