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 one year ago
find a quadratic function in standard for that has the following points: (1,2); (2,2); (3,4).
 one year ago
find a quadratic function in standard for that has the following points: (1,2); (2,2); (3,4).

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dumbcow
 one year ago
Best ResponseYou've already chosen the best response.1plug each point into equation: \[y = ax^{2} +bx +c\] this will give 3 equations with 3 variables (a,b,c) solve system of 3 equations with matrices or elimination

Beautiful_Lier96
 one year ago
Best ResponseYou've already chosen the best response.0how do i place them in that equation without an a b and c ?

dumbcow
 one year ago
Best ResponseYou've already chosen the best response.1for (1,2) ..... x=1 and y=2 ==> 2 = a*(1)^2 + b*1 + c > 2 = a+b+c

Beautiful_Lier96
 one year ago
Best ResponseYou've already chosen the best response.0if i plug it in wouldnt a still be squared or somethin ?

dumbcow
 one year ago
Best ResponseYou've already chosen the best response.1a is not squared ... the "x" is squared

Beautiful_Lier96
 one year ago
Best ResponseYou've already chosen the best response.0oh. okay so after i do that do i add all of them together ?

dumbcow
 one year ago
Best ResponseYou've already chosen the best response.1well you need to know how to solve a system of 3 equations

Beautiful_Lier96
 one year ago
Best ResponseYou've already chosen the best response.0what do you mean ?

dumbcow
 one year ago
Best ResponseYou've already chosen the best response.1after plugging in the points, you get a + b +c = 2 4a +2b +c = 2 9a + 3b +c = 4 you need to solve for a,b,c

Beautiful_Lier96
 one year ago
Best ResponseYou've already chosen the best response.0im trying to write down and figure which numbers can work for all three

Beautiful_Lier96
 one year ago
Best ResponseYou've already chosen the best response.0omg thank you. i was going to be thinking forever. and im extra tired. i know i shoulda did it by myself but idk. may you help me with one more question: The weight of a tennis ball must be 57.7 grams, plus or minus 1.7 grams. write an absolute value inequality to illustrate this rule...

dumbcow
 one year ago
Best ResponseYou've already chosen the best response.1"Oh my god, thank you. I would have been thinking about this for a long time, and I'm extra tired today. I know that I should have solved it on my own. Can you help me with another problem..." 57.7x<1.7
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