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OpenStudy (anonymous):
f(x)=2x^2-20x+4 Find the vertex
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OpenStudy (anonymous):
i think i have the answer 5,-49 but i want someone to check
OpenStudy (anonymous):
(5, -46)
OpenStudy (anonymous):
how did you get 46?
OpenStudy (anonymous):
if you substitute 5 in for x -> 2(5)^2-20(5)+4 = 2(25)-100+4 = 50-100+4 = -50+4 = -46
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