document.write( "Question 845330: Quadratic function in standard form whose graph passes though the given points.
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document.write( "(1,-2) (-2,1) (3,6)\r
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document.write( "I know it plugs into the equation ax^2+bx+c\r
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document.write( "but i have no idea how to plug them in. \n" );
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Algebra.Com's Answer #509226 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Quadratic function in standard form whose graph passes though the given points. \n" ); document.write( "(1,-2) (-2,1) (3,6) \n" ); document.write( "I know it plugs into the equation ax^2+bx+c = y \n" ); document.write( "------ \n" ); document.write( "Equations: \n" ); document.write( "Using (1,-2):: a + b + c = -2 \n" ); document.write( "Using (-2,1)::4a -2b + c = 1 \n" ); document.write( "Using (3,6):::9a +3b + c = 6 \n" ); document.write( "-------------------------------------- \n" ); document.write( "Solve the system of equations: \n" ); document.write( "I used my calculator to get: \n" ); document.write( "a = 1 \n" ); document.write( "b = 01 \n" ); document.write( "c = -3 \n" ); document.write( "------- \n" ); document.write( "Equation: \n" ); document.write( "y = x^2 -3 \n" ); document.write( "----------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |