Question

If X + 2 is is factor of x cube -2ax plus two x -1 find the value of a

Answer 1

Hii

Hope the attachment will help you

Answer 2

(X+2)= 0

X= -2

Given x = - 2 is the factor so ,

f(x) = X³ -2aX + 2X - 1

f(-2) = (-2)³-2(-2)a +2(-2)-1

-8 +4a -4 - 1 = 0

a = 13/4