Question

Is this correct?? (EXTRACTING THE SQUARE)

Answer 1

yes - it is correct but you can simplify your answer further:\[x=1\pm3\]by performing the two operations, i.e. x=1+3 or x=1-3. do the addition and subtraction to simplify this.

Answer 2

ok, thanks

Answer 3

yw :)

Answer 4

oh and this is extracting the square root, right ?

Answer 5

what do you mean by "extracting" here?

Answer 6

well my paper says to use the method "extracting the square root"?

Answer 7

I /think/ you mean "completing the square"?

Answer 8

no that's a different method

Answer 9

I personally have never heard of "extracting the square root"

Answer 10

ohh ok

Answer 11

just did a google search on it and found this: http://www.youtube.com/watch?v=LWCr_D-BvfA

Answer 12

I just watched it - interesting I never knew this had a name :)
you just taught me something new - thank! :D

Answer 13

haha no prob!

Answer 14

how would I do completing the square with this problem?
(x-1)^2-9=0

Answer 15

it is already in the form where you have completed the square.
generally you would start off from something like:\[x^2-2x-8=0\]then "complete the square" as follows:\[x^2-2x=(x-1)^2-1\]therefore:\[(x-1)^2-1-8=0\]therefore:\[(x-1)^2-9=0\]

Answer 16

oh ok so you continue with the steps after them right? ( I have the steps written down..)

Answer 17

yes :)

Answer 18

ok thanks again (:

Answer 19

yw :)