Section 11.2 Equations of Quadaratic Functions
Example 11.11. Guiding Example.
Suppose
The
multiplied out front didn't have anything to do with the roots.The
and told us exactly what the root are, but the signs are flipped because the roots come from setting those equal to 0
Definition 11.12.
If
Example 11.13.
SupposeExample 11.14.
Suppose
We already know from the discussion above that
We just need to figure out what
Now we can plug that in to get our final answer:
Checkpoint 11.15.
SupposeRight away, we can see that
We just need to figure out what
Now we can plug that in to get our final answer:
Example 11.16.
Suppose
Since we know the root, we know the factor is
From here, we follow the same strategy as before. We know the function goes through the point
Now we can plug that in to get our final answer:
Checkpoint 11.17.
SupposeSince we know the root, we know the factor is
From here, we follow the same strategy as before. We know the function goes through the point
Now we can plug that in to get our final answer: