Respuesta :
x^2 + 12 = 7x
x^2 - 7x + 12 = 0
(x - 3)(x - 4) = 0
x - 3 = 0 or x - 4 = 0
x = 3 or x = 4
x^2 - 7x + 12 = 0
(x - 3)(x - 4) = 0
x - 3 = 0 or x - 4 = 0
x = 3 or x = 4