Question

solve this question those who know​

Answer 1

just put x =a as it's a factor of

and then u will get

a=1/3

tell if correct

Answer 2

If (x-a) is factor of x³ - ax² + 2x + a -1

then x - a =0

x = a

a³ - a × a² + 2a + a - 1 =0

a³ - a³ + 3a - 1 =0

3a = 1

a = 1/3

Hope it helps......✌