# SOLUTION: I could use help on learning whare to place ordered pairs in quadratic equations. I have been ought for a long time because of a illness, so any help is greatly appreciated. my tea

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 Click here to see ALL problems on Quadratic Equations Question 21540: I could use help on learning whare to place ordered pairs in quadratic equations. I have been ought for a long time because of a illness, so any help is greatly appreciated. my teacher asks : Given the points on the graoh, find the particular equation of the quadratic function containing the given ordered pairs, write the equation in standard form y=ax^2 + bx + c............. One set of ordered pairs I am given is : (1,6),(3,26),(-2,21).......Thanks for the help, peterAnswer by venugopalramana(3286)   (Show Source): You can put this solution on YOUR website! GIVEN ORDERED PAIRS (x,y) x y 1 6 3 26 -2 21 y=ax^2+bx+c substituting the 3 ordered pairs value for x and y in this eqn.we get a+b+c=6 I 9a+3b+c=26 II 4a-2b+c=21 III II-I 8a+2b=20 or 4a+b=10 IV II-III 5a+5b=5 or a+b=1 V IV-V 3a=9 or a=3 V 3+b=1 or b=-2 I 3-2+c=6 or c=5 hence y = 3x^2-2x+5