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OpenStudy (anonymous):
Write the equation of the quadratic function with roots -2 and 4 and a vertex at (1, 9).
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OpenStudy (wolfe8):
Welcome to OpenStudy. I know that since those are the roots, the equation is a product of (x+2)(x-4)
OpenStudy (vincent-lyon.fr):
Now, if you plug 1 in the equation, then (x+2)(x-4) = -9 Since you want (1,9) and not (1,–9), then the answer to your problem will be: –(x+2)(x-4)
OpenStudy (vincent-lyon.fr):
Use the 'Mathematics' group for such questions: http://openstudy.com/study#/groups/mathematics All the best.
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