Question

If x-2 i factor of x 3 - 2ax +ax-1 the value of a is​

Answer 1

Answer:

Step-by-step explanation:

x - 2 = 0

x = 2

f(2) = 2(3) - 2a(2) + a(2) - 1 = 0

(substituting the value of x by 2)

6 - 4a + 2a -1 =0

5 -2a = 0

-2a = -5

a = 5/2

Answer 2

Answer:

x-2 =0

x=2

now as x-2 is the factor of x^3-2ax+ax-1

then we can write this as

= p(x) = x^3-2ax+ax-1

= p(2) = 2^3 -2×a×2 + 2×a -1

= 8-4a+2a-1

= 7-2a = 0

= a = 7/2

hope this may be helpful