Question

Find the roots and the vertex of the quadratic y=3x^2+9x-356 y=3x 2 +9x−356

Answer 1

y

=

3

(

x

+

3

2

)

2

−

27

4

Use the vertex form,

y

=

a

(

x

−

h

)

2

+

k

, to determine the values of

a

,

h

, and

k

.

a

=

3

h

=

−

3

2

k

=

−

27

4

Find the vertex

(

h

,

k

)

.

(

−

3

2

,

−

27

4

)