Question

find value of k if a if -1 is a zero of polynomial P of x = 2 x square - 4 x + k​

Answer 1

Given: -1 is the zero of the polynomial 2x^2 - 4x + k.

To find: The value of k.

Answer:

p(x) =  2x^2 - 4x + k.

p(-1) = 2*(-1)^2 - 4*(-1) + k

p(1) = 2 + 4 + k

p(1) = 6 + k

6 + k = 0

k = -6