Respuesta :
In order to find x-intercepts, you need to solve each binomial when it is equal to zero.
(x - 1)(x - 4)(x + 7)
x - 1 = 0
x = 1
x - 4 = 0
x = 4
x + 7 = 0
x = -7
(x - 1)(x - 4)(x + 7)
x - 1 = 0
x = 1
x - 4 = 0
x = 4
x + 7 = 0
x = -7