Question

If − 7 is a zero of the polynomial x^2 + kx + 7 , what is the value of k ?

Answer 1

Answer:

put the value of x in equation.

Step-by-step explanation:

49=14k

k=2/7

Answer 2

Answer:

k= 9

Step-by-step explanation:

given -7 is a zero of the polynomial

therefore we can substitute -7 in yhe places of x

so we get

(-7)^2+k(-7)+7

=49 - 7k + 7

56 - 7k= 0

-7k = -56

k= -56/-7

k= +9