Question

Factorise

x3-3x2 - 9 x – 5 by using factor theorem

Answer 1

Answer:

 (x +1), (x -5) and (x +1)

Step-by-step explanation:

 x³ + x² - 4x² - 4x - 5x - 5 

= x²( x + 1) - 4x ( x + 1) - 5(x + 1) 

= (x + 1)(x² - 4x - 5) 

= (x + 1)(x² -5x + x - 5)

= (x + 1)(x - 5) (x + 1) 

Answer 2

Answer:

x

3

−3x

2

−9x−5

⇒x

2

(x+1)−4x(x+1)−5(x+1)

⇒(x+1)(x

2

−4x+5)

⇒(x+1)(x

2

−5x+x−5)

⇒(x+1)(x(x−5)+1(x−5))

⇒(x+1)(x−5)(x+1)

⇒(x

2

−1)(x−5)

Step-by-step explanation:

Hope it helps you........