Question

If12is a root of the equation x2+kx—54= 0, then the value of k is

Answer 1

Step-by-step explanation:

x = 12

X2+kx-54=0

12*12+12k =54

144+12k=54

12k= 54-144

12k = -90

k = -90/12

k = - 15/2

Answer 2

Answer:

-15/2

Step-by-step explanation:

12^2+12k=54

12k= -90

k = -15/2