Respuesta :
k = 5
since x = 2 is a root then f(2) = 0
substitute x = 2 into the equation
4k - 28 + 8 = 0
4k - 20 = 0 ( add 20 to both sides )
4k = 20 ( divide both sides by 4 )
k = 5
If one root is 2 then
k(2)^2 - 14(2) + 8 = 0
4k - 28 + 8 = 0
4k = 28 - 8
4k = 20
k = 5 (answer)
