Relax

Respuesta :

Answer:

Step-by-step explanation:

it cuts x-axis where y=0 or f(x)=0

x²-3x-28=0

x²-7x+4x-28=0

x(x-7)+4(x-7)=0

(x-7)(x+4)=0

x=7,-4it will cut x-axis at (-4,0) and (7,0)