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anonymous
 one year ago
Find the maximum or minimum of the following quadratic function: y = 2x2 + 4x  1.
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anonymous
 one year ago
Find the maximum or minimum of the following quadratic function: y = 2x2 + 4x  1. 1 0 1 4

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campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0is this question algebra of calculus...?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0ok... here is the the key, the parabola is concave down, since the coefficient of x^2 is 2 so for a quadratic \[ax^2 + bx + c = 0\] the line of symmetry is \[x = \frac{b}{2 \times a}\] you have a = 2 and b = 4 the maximum of minimum lies on the line of symmetry so find the value of x, and then substitute it into the original equation to find the max value

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I don't quite understand... I just need to know whether its a b c or d im learning how to do it I just don't have the time...

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0yes but to find it, a simple method is to find the line of symmetry and the substitute that value into the equation

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0and alternate method is to just graph the curve and read off the value.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0look im not like most people on here I know nearly nothing about math which is why im taking this class.. I don't have any idea what youre talking about and im stressing about this cause I need to pass...

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0ok... then use this site https://www.desmos.com/calculator type in the equation on the left and then read off the highest y value

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0that correct.... the line of symmetry is x = 4/(2 x 2) so x = 1 subsitute that value into the equation and you get y = 2 *(1)^2 + 4*(1)  1 or y = 1 so the parabola is concave down, the you have a maximum at y = 1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so one is the answer?
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