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14 October, 19:24

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

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Answers (1)
  1. 14 October, 19:32
    0
    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

    )
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