Identify the constants in the expression: ax2 + bx + c
Multiply the constants, a and c.
Now try to find 2 positive factors of the product, whose sum equals b.
Once calculated, expand the expression and rewrite it.
Now use the above mentioned steps of factoring by grouping, to get the simplified expression.
Let's solve some trinomial expressions now!
Read more at Buzzle: http://www.buzzle.com/articles/factoring-by-grouping.html