Answer:
b.
Step-by-step explanation:
expand (x-2)(x+4)
(x-2)(x+4)=0
x²+2x-8=0
a=1,b=2,c=-8
From this equation we know that ,
a>0, the shape of the graph is a minimum graph.
c is the y-intercept ,the graph will intercept -8 at y-axis .
By solving this (x-2)(x+4)=0 we know the x-intercept of the graph .
(x-2)(x+4)=0
x=2 ,x=-4
