Posted by Kiley on Monday, November 3, 2008 at 5:52pm.
Don't you mean
y = 3x^2 +12x -8 ?
If so, "complete the square" and rewrite it as
y = 3(x^2 + 4x + 4)- 20
= 3(x+2)^2 -20
That is symmetric about x = -2, and has a vertex at
x = -2, y = -20
how to graph
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