x^2= 16x-28

x^2 = 16x -28

x^2 - 16x +28 =0

(x -14) (x -2) =0

x -14 =0 or x-2 =0

x =14 or x=2

there are two answers for x

they are 14 and 2

x^2= 16x - 28         rearrange as

x^2 - 16x + 28 = 0      factor  as

(x - 2) (x - 14) = 0       and setting each factor to 0, we have that x = 2 and x = 14