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college algebra

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Given the following quadratic equation, find
a. the vertex
b. the axis of symmetry
c. the intercepts
d. the domain
e. the range
f. the interval where the function is increasing, and
g. the interval where the function is decreasing
h. Graph the function.

y=x^2+4x

  • college algebra -

    The answer to this question is 0.

  • college algebra -

    change it to the standard form
    y = a(x-p)^2 + q , by completing the square

    y = x^2 = 4x
    = x^2 + 4x + 4 - 4
    = (x + 2)^2 - 4

    All the above can now be answered readily.
    The form y = a(x-p)^2 + q
    should be in your text or in your notes from class.

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