document.write( "Question 487788: f(x)=1/2x^2+6x+7\r
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document.write( "I know that the vertex is (-6,-11)\r
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document.write( "I know that the graph opens up. \r
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document.write( "I know the equation of the axis of symmetry is -6.\r
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document.write( "What I need to figure out is what the x intercepts are.\r
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document.write( "It says to type the exact answer using radicals as needed. Simply as needed. Do not factor.\r
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document.write( "Geee I am so confused! \n" );
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Algebra.Com's Answer #333134 by stanbon(75887) ![]() You can put this solution on YOUR website! f(x)=1/2x^2+6x+7 \n" ); document.write( "I know that the vertex is (-6,-11) \n" ); document.write( "I know that the graph opens up. \n" ); document.write( "I know the equation of the axis of symmetry is -6. \n" ); document.write( "What I need to figure out is what the x intercepts are. \n" ); document.write( "It says to type the exact answer using radicals as needed. Simply as needed. Do not factor. \n" ); document.write( "---------- \n" ); document.write( "x-intercepts: \n" ); document.write( "Let y = 0, and solve for \"x\" using the Quadratic Formula: \n" ); document.write( "1/2x^2+6x+7 = 0 \n" ); document.write( "a = (1/2) ; b = 6 ; c = 7 \n" ); document.write( "--- \n" ); document.write( "x = [-b +- sqrt(b^2-4ac)]/(2a) \n" ); document.write( "---- \n" ); document.write( "x = [-6 +- sqrt(36 - 4*(1/2)*7)]/(1) \n" ); document.write( "--- \n" ); document.write( "x = [-6 +- sqrt(12)] \n" ); document.write( "--- \n" ); document.write( "x = -6+2sqrt(3) or x = -6-2sqrt(3) \n" ); document.write( "======================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |