Question

find the value of a if x-a is a factor of x^3-a^2x+x+2

Answer 1

x-a is a factor of given polynomial then x-a=0
x=a put in given exp
(a)3 - a sq(a) + a +2=0
a cube - a cube +a+2=0
a 3 cancel
a+2=0
a=-2 ans

Answer 2

Step-by-step explanation:

f(x)=x3-a2+x+2

f(a)=a3-a3+a+2

     = a+2=0

     =>a=-2

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