SOLUTION: I need help solving the quadratic function,For Each Funtion:(a) determine whether the graph opens down or up, (b) find the axis of symmetry, (c)find the vertex, (d)find the y-inter

Question 214893: I need help solving the quadratic function,For Each Funtion:(a) determine whether the graph opens down or up, (b) find the axis of symmetry, (c)find the vertex, (d)find the y-intercept,(e) find the zeros, and (f) graph the function
the equation is: -(x+4)(x-2)
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!

If the coefficient of the squared term is
negative ( in this case), then
the parbola opens down.
The axis of symmetry is at
when the general form of the equation is
, so

The axis 0f symmetry is
and, when ,

The vertex is at (-1,9)
also

There is a zero at

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