Question

Need help with this math question (pic included)

Answer 1

Explanation:

x² +jx +k = 0

If there is only one root ( - 4 ), then (x + 4)² = 0

or

x² + 8x + 16 = 0

j = 8 and k = 16

Answer 2

8

Explanation:

If the only zero for this function is at x = - 4 it looks like this:

f(x) = (x+4)(x+4) = x^2 +8x + 16 so j = 8