document.write( "Question 879046: I have to find the maximum or minimum value of each quadratic relation\r
\n" ); document.write( "\n" ); document.write( "y= -2x^2 + 12x\r
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\n" ); document.write( "\n" ); document.write( "y= -3x^2 -21x - 18
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Algebra.Com's Answer #530463 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
I will do ONE of them and you do the other one based on the method.\r
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\n" ); document.write( "\n" ); document.write( "Compete the square to put the equation into standard form.
\n" ); document.write( "\"y=-3x%5E2-21x-18\"
\n" ); document.write( "\"-3%28x%5E2%2B7x%2B6%29\", missing term to use is \"%287%2F2%29%5E2\".
\n" ); document.write( "\"-3%28x%5E2%2B7x%2B%287%2F2%29%5E2%2B6-%287%2F2%29%5E2%29\"
\n" ); document.write( "\"-3%28%28x%2B7%2F2%29%5E2%2B6-49%2F4%29\"
\n" ); document.write( "\"-3%28%28x%2B7%2F2%29%5E2%2B24%2F4-49%2F4%29\"
\n" ); document.write( "\"y=-3%28%28x%2B7%2F2%29%5E2-25%2F4%29\"
\n" ); document.write( "\"highlight%28y=-3%28x%2B7%2F2%29%5E2%2B75%2F4%29\"
\n" ); document.write( "The vertex is a maximum, occurring at \"highlight%2875%2F4%29\", read directly from the standard form equation.\r
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\n" ); document.write( "\n" ); document.write( "You can learn more about this in the lesson:
\n" ); document.write( "http://www.algebra.com/tutors/Completing-the-Square-to-Solve-General-Quadratic-Equation.lesson?content_action=show_dev
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