Question

).
Example 15 : Factorise x3 – 23x2 + 142x – 120.​

Answer 1

Answer:

$x³-x²-22x²+22x+120x+120$

$x²(x-1)-22x(x-1)+120(x-1)$

$(x-1)(x²-22x+120)$

$(x-1)(x²-12x-10x+120)$

$(x-1)(x(x-12)-10(x-12))$

$(x-1)(x-10)(x-12)$