Question

F(x) = x(x + 7)(x + 2)

Answer 1

We can also find the vertex by using the expressions:

(

−

b

2

a

,

f

(

−

b

2

a

)

)

Standard form:

a

x

2

+

b

x

+

c

=

0

In this example,

a

=

−

1

and

b

=

0

x

=

−

0

2

(

−

1

)

=

0

2

=

0

y

=

f

(

0

)

=

7

−

0

2

=

7

Same result of

(

0

,

7

)