Question

if x + 1 is a factor of x^3 - 3x + a then factorize x^3 - 3x + a

Answer 1

Step-by-step explanation:

x+1=0

x=-1

(-1)³-3(-1)(+a

-1+3+a

2+a=.

a=-2 OK friend this is urs answer

Answer 2

Answer:

Let P(x)=x

3

−3x

2

a+2a

2

x+b

Given, (x−a) is a factor of P(x)

∴P(a)=0

⇒(a)

3

−3(a)

2

a+2a

2

(a)+b=0

⇒a

3

−3a

3

+2a

3

+b=0

⇒3a

3

−3a

3

+b=0

⇒b=0

Option A is correct.