Bellringer: Find the axis of symmetry
A. y=x²+4x+1
-4/2=-2 x=-2
B. 2x²-6x+3
6/4=3/2
C.-2x²+5x+1
x=-5/4
REMEMBER: What you learn in September will haunt you in May!!!
Practice Question 2:
x²-5x+8
1. Axis of Symmetry
x=5/2 or x=2.5
2. Y-intercept
The y-int. is C so in this equation it is 8
3. Vertex
(2.5) ²-5(2.5) +8=1.75
When this is graphed it should look like a “U” above the x-axis. Since the parabola is above the x-axis no real zeros exist.
Question: (To see if you were paying attention to Mrs. Sullivan)
*Do you have to reduce radicals on the IB test?
no you can just leave it like that
ReplyDeleteYou can if You want to but You are not required, even if the radical would be a perfect square. For example 16.
ReplyDeleteno because no real zeros exists
ReplyDeleteif you want to
ReplyDeleteFor the IB test, no u do not have to reduce them
ReplyDelete