Question

question about quadratic formula..once I get to x=-2+-square root 8/2 what do I do then?

Answer 1

Pat yourself on the back?
Just simplify and factorize, whatever you were asked to do...

Answer 2

not sure what to do..hence why I am asking

Answer 3

you can see right away the 2's are going to go away (sqrt 8) = 2sqrt2

Answer 4

so I divide the 2 into the square root?

Answer 5

x=(-2+-square root 8)/2

=(1+-sqrt2)

Answer 6

why not 4?

Answer 7

Why not 4 what?

Answer 8

because I divide again by the 2?

Answer 9

sqrt8 = sqrt4*sqrt2 = 2 root 2

Answer 10

Do you get it?

Answer 11

barely, and what happens to the negative out side the square root?

Answer 12

You have (-2+-square root 8)/2 which is
(-2+-2square root 2)/2 and now divide away the 2's
(-1+-square root 2) which is 2 roots
(-1+square root 2) and
(-1- square root 2)

Answer 13

and its acceptable to write it as one expression?

Answer 14

not repeat it twice?

Answer 15

What was it that you were asked (what was the question exactly)?

Answer 16

just solve by quadratic formula

Answer 17

x=-1+-square root 2 is fine.

Answer 18

perfect! ty!

Answer 19

ur welcome.

Answer 20

Do you know about completing the circle?

Answer 21

Ask a new question.....

Answer 22

need to solve...x^2+8x-9=0 but need to know how to do it..

Answer 23

Do your question as a new question....