Question

if x = 2 is the factor of x power 3 minus 2 x power 2 + a x minus 1 then the value of a is​

Answer 1

Answer:

Let P(x)=x2+3ax−2a

Given,  (x−2) is a factor of P(x)

x−2=0

x=2

∴P(2)=0

⇒22+3a(2)−2a=0

⇒4+4a=0

⇒a=−1