Answer:
= x − 4
Step-by-step explanation:
Let's simplify step-by-step.
3x−(2x+4)
Distribute the Negative Sign:
=3x+−1(2x+4)
=3x+−1(2x)+(−1)(4)
=3x+−2x+−4
Combine Like Terms:
=3x+−2x+−4
=(3x+−2x)+(−4)
= x - 4
Answer: the pitch of the roof is 2/9
Something funny is that the x value of the vertex lies directl in the middle of the x intercepts
so
we see the x intercepts or 0's at x=8 and 2
the average is x=5
so find f(5) to find the y value of the vertex
f(5)=(5-8)(5-2)
f(5)=(-3)(3)
f(5)=-9
vertex is at (5,-9)
the actual way the teacher wants is to expand then compltete the square to get into the form f(x)=a(x-h)^2+k where the vertex is (h,k)
but whatever
verrtex is at (5,-9)
