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OpenStudy (anonymous):
What is the vertex of the graph of this function? y= -(x-1)(x+3) A. (1,-3) B. (-1,4) C. (-2,-3) D. (2,5) ***My answer: B. (-1,4) am i right?? :D
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OpenStudy (anonymous):
is this one correct? is my answer B. (-1,4) ????
OpenStudy (anonymous):
open first FOIL
OpenStudy (anonymous):
|dw:1350175760365:dw|
OpenStudy (anonymous):
-x^2-2x+3 use x=-b/2a
OpenStudy (anonymous):
and i plugged it in like this |dw:1350175802001:dw|
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