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fibonacci_girl
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rtex of the quadratic equation: y = 2x2 + 12x − 4.
 3 years ago
 3 years ago
fibonacci_girl Group Title
rtex of the quadratic equation: y = 2x2 + 12x − 4.
 3 years ago
 3 years ago

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fibonacci_girl Group TitleBest ResponseYou've already chosen the best response.0
vertex
 3 years ago

mathTalk Group TitleBest ResponseYou've already chosen the best response.1
2(x^2 + 6x2)=0 x^2+6x2=0 x = (6+(36+8)^(1/2) / 2 x= some complex
 3 years ago

mathTalk Group TitleBest ResponseYou've already chosen the best response.1
what is a vertex ?
 3 years ago

fibonacci_girl Group TitleBest ResponseYou've already chosen the best response.0
yes i need coordinates
 3 years ago

love_math Group TitleBest ResponseYou've already chosen the best response.0
let the vertex=(x,y)
 3 years ago

love_math Group TitleBest ResponseYou've already chosen the best response.0
then x=b/za, according to y=ax^2+bx+c
 3 years ago

love_math Group TitleBest ResponseYou've already chosen the best response.0
so the answer is (3,22), do you understand?
 3 years ago

mathTalk Group TitleBest ResponseYou've already chosen the best response.1
f'(x)=2(2x+6)=0 x = 3 y = 22 f''(x)=4 >0 hence local minimum (3,22) ??
 3 years ago

fibonacci_girl Group TitleBest ResponseYou've already chosen the best response.0
yes thanks
 3 years ago

love_math Group TitleBest ResponseYou've already chosen the best response.0
yes ,the minimum is 22
 3 years ago
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