Question

2
If x=1 is a zero of the polynomial
a zero of the polynomial F(x)= x2 - 5x+k, then the value of k is
(A) 4
(B) -4
(C) 6
(D) -6​

Answer 1

Answer:

(A)4

Step-by-step explanation:

x=1

f(x)= x2 - 5x + k

f(1)= 1*1 - 5*1 + k = 0

=1-5 + k = 0

=-4 + k = 0

Therefore

k = 4