Respuesta :

chudung1976
You know the formula of discriminant

a  b
c  d
that means ad-bc
So we have an equation
(-12)x3-(2f)x(-w²)= 2k x 3- (-14)x(-81)
0r -36 +2fw²= 6k- 1134
And 2fw²-6k+ 1098=0
But I did not know what is variable here?