Question

Factorise : x3 – 3x2 – 9x -5

Answer 1

Answer:

-6x-11

Step-by-step explanation:

1. -9x+6x-(6+5)
2. -3x-11

Answer 2

$\large{ \bigstar}$ Given:

• x³ - 3x² - 9x - 5

$\large{ \bigstar}$ Solution:

$\hookrightarrow$ x³ + x² – 4x² – 4x – 5x – 5

$\hookrightarrow$ x²( x + 1) – 4x ( x + 1) – 5(x + 1)

$\hookrightarrow$ (x + 1)(x² – 4x – 5)

$\hookrightarrow$ (x + 1)(x² -5x + x – 5)

$\hookrightarrow$ (x + 1) (x – 5) (x + 1)

Hence,

• (x +1), (x -5) and (x +1) are the factors of given polynomial.

$\bigstar{\underline{\boxed{\tt\large\pink{ Zeros \ of \ Polynomials :-}}}}$

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