Question

Quadratic Equation | Is my answer correct?
http://gyazo.com/e11e566bf7bebd14455dff7c75e86e2b

Answer 1

Please, not all at once. D:

Answer 2

there are many ways to approach this so there is no 'correct first step'. if you are expected to go by some method prescribed in your material, then you will have to share that material.

Answer 3

It wants me to show the first step on making it into this format:

Answer 4

i can do any of the options and still reach a final conclusion ....

Answer 5

(x-p)^2 = q

Answer 6

So basically, the first step to converting it.

Answer 7

May I show you what I think?

Answer 8

please do

Answer 9

Hm.

Answer 10

GIve me a second please

Answer 11

Sorry.

Answer 12

focus on making a complete square

Answer 13

Yes, so (x - 9) * (x-9)

Answer 14

Then (x-9)^2

Answer 15

(x+9)^2 yes

what do we get when we expand it?

Answer 16

x-9 squares out to -18x which is not correct

Answer 17

I'm not too sure what to do then, in that case.

Answer 18

Tell me what you think

Answer 19

do you agree that we want (x+9)^2 ??

Answer 20

Does it correspond to the answer to my problem?

Answer 21

(x+n)^2 = x^2 + 2n x + n^2

therefore 2n = 18 when n=9

(x+9)^2 = x^2 + 18x + 81

Answer 22

as such, we want to convert the last term:

76+x = 81 when x=?

Answer 23

x = 5

Answer 24

then lets add x to each side, and x=5

Answer 25

So then we subtract 5!

Answer 26

oh XD

Answer 27

So then my answer would be B, amistre?

Answer 28

x^2 + 18x + 76 + x = 0 + x

x^2 + 18x + 76 + 5 = 5

x^2 + 18x + 81 = 5

Answer 29

yes add 5 :) B is fine

Answer 30

Thanks, you helped a lot :DDD

Answer 31

now,

if we add 9 and then subtract 4, we have still gotten to adding a net of 5, so A works as a first step

if we subtract 5 and add 10, then we have added a net of 5 and C works as a first step

if we subtract 9 and add 14, then we have added a net of 5 and D works as a first step

Answer 32

but if we add 5 and subtract nothing, we have added a net of 5 an B is the 'quickest' option

Answer 33

Yes.

Answer 34

as you can see, i can 'start' with any of the options as a first step and still get to the final conclusion. so the questionis simply worded poorly

Answer 35

Yeah, FLVS is known for that ;)

Answer 36

Thanks again.

Answer 37

good luck :)