Question

for what value of K is 4a
zеrо of f(x) = x²+kx+4​

Answer 1

Answer:

Substitute the value of k into the equation

Answer 2

$f(4) = {4}^{2} + 4k + 4 \\ \: \: \: \: \: \: \: \: \: \: \: \: 16 + 4k + 4 \\ 20 + 4k = 0 \\ 4k = - 20 \\ k = \frac{ - 20}{4} = - 5$

k= -5