Question 457714
<pre>
Rule for y = &#8591;x² ± &#8591;x ± &#8591;
where there are numbers in the boxes and the sign ±
could either be + or -:

If the coefficient of x² is a POSITIVE number,
the graph looks like this:
{{{graph(100, 100,10,20,14,20,(x-15)^2+15)}}}
which opens UPWARD and has a MINIMUM point at 
the bottom. 

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If the coefficient of x² is a NEGATIVE number,
the graph looks like this
{{{graph(100, 100,10,20,-20,-14,-(x-15)^2-15)}}}
which opens DOWNWARD and has a MAXIMUM point at 
the top.

-------------------------------------------

Your equation is

y = 3x² + 2x &#8722; 10

and the coefficient of x² is 3, and 3 is a POSITIVE
number, so its graph is the first kind.  It opens 
UPWARD and has a MINIMUM point at the bottom. 

If fact here is the graph of your equation:

{{{graph(200,3200/7,-4,3,-11,5,3x^2+2x-10)}}}

Edwin</pre>