Question

Factorise x^3 - 3x^2 - 9x - 5​

Answer 1

(x +1), (x -5) and (x +1)

Step-by-step explanation:

The computation of the factorization is shown below

Data provided in the question

`X^3 - 3x^2 - 9x - 5`

Based on the above information, the factors are

Now we have to open these equations in order to get the factors which are as follows

`= x^3 + x^2 - 4x^2 - 4x - 5x - 5`

`= x^2( x + 1) - 4x ( x + 1) - 5(x + 1)`

`= (x + 1) (x^2 - 4x - 5)`

`= (x + 1)(x^2 -5x + x - 5)`

So,

= (x + 1) (x - 5) (x + 1)

Therefore the (x +1), (x -5) and (x +1) are the factors of the mention polynomial give in the question