Question

Algebra 2 shenanigans >.>
Solve the quadratic equation by completing the square.
x^2 - 2x = -2

Answer 1

Options:
A. {1 + i, -1 - i}
B. {-1 + i, 1 - i}
C. {-1 + i, -1 - i}
D. {1 + i, 1 - i}

Answer 2

Hate to admit it, but I have absolutely no clue how to do this >.>

Answer 3

Are those suppose to be x instead of i's..

Answer 4

And I don't see why you would need to complete the square here.

x^2-2x=-2

If you add the two

x^2-2x+2=0

that's a factorable trinomial

Answer 5

The x's are x's... and I just realized what I was doing wrong... I think >.> Might need help later down the line

Answer 6

I mean the answers for your option choices..i don't see imaginary solutions

Answer 7

Oh no, the i's are i's, which is why I'm getting confused... the teacher might have made a mistake but who knows >.>

Answer 8

Oh man..I just said x^2-2x+2=0 is factorable..I must be going crazy.

Answer 9

Give me a sec

Answer 10

You DO need to complete the square lol

Answer 11

lol yeah because the factors of 2 will add up to three :P in that case, I got this:
x^2 -2x - 1 = -2 -1

Answer 12

which ends up being (x-1)^2 = -3.... and then square root... Dang it, I just needed to think about it more xD Over-complicating things is my specialty smh

Answer 13

nope, nevermind... did something wrong again >.> homework + late at night = not a good combo

Answer 14

I got it lol

x^2-2x=-2

Get a new c value using (b/2)^2

(-2/2)^2=1

add one to both sides

x^2-2x+1=-1

factor trinomial

(x-1)^2=-1

take square root of both sides

x-1=square root of -1

-1=i

x-1=i

add the one

x=1 +/- i

Answer 15

i actually forgot how to complete the square for a second

Answer 16

happens to everyone (i hope)

Answer 17

Thanks sooo much! subtracted a one instead of adding >.> oops

Answer 18

Heck, we learned about completing the square days ago and I forgot so I assuming it happens to everyone :P

Answer 19

your welcome, to be sure, what is your answer choice?

Answer 20

D .-.

Answer 21

Yes xD

Answer 22

you actually tried and did a lot on this problem, i like that.

Answer 23

alot of people just ask for answers

Answer 24

thanks for not being one of them

Answer 25

You're welcome .-. besides, how will I learn anything if I didn't at least attempt it myself? xD I have to catch mistakes I make so that I (hopefully) don't repeat them .-.

Answer 26

i wish everyone had your mentality. i got into plenty of arguments with people too lazy to try anything. anyways, feel free to tag me onto anything, i'll gladly help you if i can.

Answer 27

Haha thank you so much! :) I know I said it before, but I want to say it again xD You really helped me out a lot :)