Question

If one zero of the following polynomial is -4, then the value of k is x²-3x+k

Answer 1

Answer:

-28

Step-by-step explanation:

f(x) = x² - 3x + k

one zero of the polynomial is -4

f(-4) = 0

(-4)² - 3(-4) + k =0

16 + 12 + k =0

28+k=0

k= -28

Answer 2

Answer:

x^2-3x+k=p(x)

p(-4) = -4^2-3(-4) +k=0

16+12+k=0

k=-28