4f+Solving+Quadratic+Equations+by+completing+the+square

__A Helpful Link :__ http://www.purplemath.com/modules/sqrquad.htm


 * Example 1: **

Now here is another example (with less explanation within the equation)

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 * Example 2:

Step by step: __Step 1:__ Get rid get rid of the "junk" -I got rid of the -3 by adding 3 to both sides so on the left side it canceled out and added 3 to the right __Step 2:__ Setting it up -To get what is in the parenthesis, you have to take half of "b" -"b" is the middle term, in this case it is 6 -We have to take half of 6, which in this case is 3. So in the next line, that is where i got 3 from. __Step 3:__ Getting the "missing" part -Now to get the last term, you have to square the last term in the parenthesis. -In this case in the parenthesis, the number is 3. So we square that and get 9. -REMEMBER what we do to one side we do to the other -So in the equation we have +9 on the left side, so we have to add 9 to the right side -There is a 3 already there so... 3+9=12 (that is how i got the 12) __Step 4__: Taking the square root -I then take the square root of both sides to get rid of the exponent -On the right side, you can't forget BOTH + and - -You also have to simplify the radical! TADA!!!!! once you simplify you will get your final answer  

**Now try this by yourself:

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Answer: **