document.write( "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.............
\n" ); document.write( "One set of ordered pairs I am given is : (1,6),(3,26),(-2,21).......Thanks for the help, peter \n" ); document.write( "
Algebra.Com's Answer #11626 by venugopalramana(3286)\"\" \"About 
You can put this solution on YOUR website!
GIVEN ORDERED PAIRS (x,y)
\n" ); document.write( " x y
\n" ); document.write( " 1 6
\n" ); document.write( " 3 26
\n" ); document.write( " -2 21
\n" ); document.write( " y=ax^2+bx+c substituting the 3 ordered pairs value for x and y in this eqn.we get
\n" ); document.write( " a+b+c=6 I
\n" ); document.write( " 9a+3b+c=26 II
\n" ); document.write( " 4a-2b+c=21 III \r
\n" ); document.write( "\n" ); document.write( "II-I 8a+2b=20 or 4a+b=10 IV
\n" ); document.write( "II-III 5a+5b=5 or a+b=1 V
\n" ); document.write( "IV-V 3a=9 or a=3
\n" ); document.write( "V 3+b=1 or b=-2
\n" ); document.write( "I 3-2+c=6 or c=5
\n" ); document.write( "hence y = 3x^2-2x+5
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