Question

If x-a is a factor of x^3-3x^2a+2a^2+b, find b?​

Answer 1

Answer:

Correct option is

A

0

Step-by-step explanation:

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