Completing the Square, Quad form

[DiomondJim]

Homework Statement

Hi, I'm not very smart but can someone walk me though the basic completing the square formula for basic polynomials and more advanced ones ( with a variable in front of )

is there a easier and faster way to use quad form because it takes me like 10 minutes per problem to plug it all in.

Homework Equations

some random examples X^2+13x+18=0 and 10X^2+ 5x+9 (no idea if these work out but i just made them up.

The Attempt at a Solution

 

[ideasrule]

Can you follow this guide?

http://www.mathsisfun.com/algebra/completing-square.html

Your teacher should have also worked through a few examples in class. If you can't understand these examples, feel free to post them here and ask specific questions about the parts you don't understand.