math (1125) - Quad: quadratic inequalities

went over a few examples of quadratic inequalities today.

we highlight different parts depending on the sign

lets say

y = ax^2 + bx + c

if y = 0, highlights are on x-axis

if y > 0, highlights are above x-axis (arrows)

if y < 0, highlights are below x-axis (vertex)

concavity will change the graph, keep that in mind.

ooh i see how it goes. for negative numbers, y <> 0 is highlighted on the vertex.. so its still above/below

ok thats awesome.

notes finished for tonight ^^