Question

If x + 4 is a factor of 3x2 + kx + 8 then what is the value of k?

Answer 1

Answer:

X+4=0

So

X=-4

Now

substitute in a place of x

3(-4)^2+k(-4)+8=0

3(16)-4k+8

48 - 4k+8=0

48-4k=-8

-4k=-8-48

-4k =-56

K=-56/-4

K =14

May it helps you