Question

4. Factorise :
(i) x³-2x²-x+2
(ii) x³-3x²-9x-5
(iii) x³+13x²+23x+20
(iv) 2y³+y²-2y-1​

Answer 1

Step-by-step explanation:

Answer

i) x³-2x²-x+2

= (x³-x)(2x²+2)

=x(x²)+2(x²)

=x²(x+2)

ii) x³-3x²-9x-5

= (-3x²-9x)(x³-5)

= -3x(3x-3)(x³-5)