Question 303054
<pre><font size = 4 color = "indigo"><b>
{{{3x^2+28x+9=0}}}

You factor the left side.  Do you know how to 
factor a trinomial?  If not you need to learn
how. 

{{{(3x+1)(x+9)=0}}}

Then one of those factors in parentheses must be = 0 in order
that the product of them equals 0.   Either one could be 0, so
we take both possibilities and end up with two possible solutions.
so:

{{{matrix(3,4,

3x+1=0," "," ",x+9=0, 
3x=-1," "," ",x=-9,
x=-1/3," "," "," ")}}}
 
Edwin</pre>