Completing Square and quadratics

[physics2]

Homework Statement

Solve for x
Q1. 4x^2-9=0
Q2. x^2+11x+28=0
Q3. x^2+4x+3=0
Q4. 2y^2+y-1=0
Q5. 6x^2-x-1=0

Homework Equations

What are non-monic and monic equations?
How do I use the "Completing the square method"?
Could you please show me the working out you did?

The Attempt at a Solution

N/A
_________
Thanks for the help

 

[Gib Z]

You surely have some notes on this, or a chapter in your textbook that explains this? For really general questions like this, if you seriously can't find anything in your notes or textbook, its very simple to search terms like "monic" and "completing the square" into Google! We are here for specific help, when you are stuck on a question that you have given a serious attempt to!

 

[physics2]

yes, there are notes, but i didn't completely understand them as the lacked detail, even if you could post the method, that would be fine... google hasnt been much of a help

 

[Gib Z]

We say a quadratic function is "monic" if it's leading coefficient, usually represented by "a", is equal to 1.

Look at http://en.wikipedia.org/wiki/Completing_the_square