Algebra Ii Unit V: Quadratics Unit Notes Packet Functions Worksheet Page 10
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235.2: Solving Quadratics By Graphing
Warm-up: Graph the following quadratic functions.
2
2
A.
B.
y
3
x
6
x
3
y
( 2
x
) 1
3
=
−
−
=
−
−
+
Notes: Solving Quadratics by Graphing
By now you are a pro at graphing parabolas from quadratic functions such as
, but what if we wanted to solve an
equation such as
for x?
We can use our skills at graphing parabolas to figure out what x or x’s would equal
to satisfy the equation.
Now, our quadratic is equal to 0, so if we graphed it, where would we find our
solution(s)?
Quadratic equations can have
,
, or
A solution to a quadratic function is also known as a
,
,
or
10
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