Question

find the value of a if x-a is a factor of x cube -ax square + 2x +a-1

Answer 1

Answer:

Step-by-step explanation:

P(x)= x^3-ax^2+2x+a-1

If (x-a) is the factor then x=a and P(x)=0 then substitute a in P(x) instead of x

That is

0= a^3-a^3+2a+a-1

0=3a-1

a=1/3

Hope you get it!

Answer 2

here , if x-a is factor of given polynomial then

x-a=0

x=a

therefore,

put value of x in polynomial

acube-acube+2a+a-1=o

3a+1=0

a=1/3