Question

Factorise :
x³-2x²-x+2​

Answer 1

Answer:

→  x³-2x²-x+2

=> x²(x-2)-1(x-2)

=> (x²-1)(x-2)

(1 can be Expressed as 1²)

=> (x²-1²)(x-2)

(a²-b² = (a+b)(a-b))

=> (x+1)(x-1)(x-2)

The factors of x³-2x²-x+2 are→

(x+1)(x-1)(x-2)

Answer 2

Answer:

lets do by grouping method

the question is -x³-2x²-x+2

after making group it become

(x³-2x²) (-x+2)

after taking common factor out it comes =

x²(x-2)-(x-2)

and the answer is=(x-2)(x²-1)