document.write( "Question 117535: How do you solve 2n^2-4n=6 and then put it into a table or graph? \n" ); document.write( "

Algebra.Com's Answer #85505 by stanbon(75887) $\"\"$ $\"About$

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How do you solve 2n^2-4n=6 and then put it into a table or graph?
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\n" ); document.write( "2n^2-4n-6 = 0
\n" ); document.write( "2(n^2-2n-3) = 0
\n" ); document.write( "(n-3)(n+1) = 0
\n" ); document.write( "n = 3 or n = -1
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\n" ); document.write( "y= 2n^2-4n-6
\n" ); document.write( "It has x-intercepts at (3,0) and at (-1,0)
\n" ); document.write( "The vertex is at x=-b/2a = 4/(4) = 1 ; f(1) = 2-4-6 = -8
\n" ); document.write( "So the vertex is at (1,-8)
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\n" ); document.write( "With those three points you can graph the parabola.
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\n" ); document.write( "Graph:
\n" ); document.write( " $\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C2x%5E2-4x-6%29\"$
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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