Question

http://gyazo.com/5eb38d437dbb26489f3bc5088504a8b5

Answer 1

PLS MEDAL AND FAN

Answer 2

@tkhunny

Answer 3

@vera_ewing pleaseeeeeeeeeeeeeeee

Answer 4

What say you? Where does it go horribly wrong?

Answer 5

I have no idea. A or B?

Answer 6

Never "Completed the Square"?

You'll have to follow the algebra and see.

Hint: \(r + s^{2} \ne (r+s)^{2}\) - generally.

Answer 7

I DONT HAVE A SINGLE IDEA HOW TO DO THIS.

Answer 8

wow what a mean question !!

Answer 9

you have to look at every single line to see where the mistake is made and even then it is confusing because they corrected in in the end

Answer 10

It's just completing the square. It's not a difficult thing. You should have this skill unless you haven't been paying attention in class.

Answer 11

we can take them step by step if you like, it really has nothing to do with completing the square, not to disagree with @tkhunny

Answer 12

I'm helping my daughter mate.... @tkhunny

Answer 13

Disagree, if you wish, but it is EXACTLY completing the square. That is where the Quadratic Formula comes from.

Answer 14

yes i know that, i mean this question has nothing to do with completing the square, they are only asking you to find a typo
it is copy editing is all, has nothing to do with the math involved

Answer 15

it is like "find the difference between these two pictures"
don't think about math, just find one line where they copied something different than the previous line

Answer 16

C? Ugh. I don't know.

Answer 17

step 6 \[x+\frac{b}{2a}=\sqrt{\frac{-c}{a}+\left(\frac{b}{2a}\right)^2}\]
step 7
\[x=-\frac{b}{2a}+\sqrt{\frac{-c}{a}+\left(\frac{b}{\color{red}{4a}}\right)^2}\]

Answer 18

it is just a typo, has nothing whatsoever with the quadratic formula, completing the square, any math at all
just a simple typo for you to find

Answer 19

So d?

Answer 20

what makes it worse it it was rectified in the next step, so the actual formula is correct

Answer 21

yeah D

Answer 22

if this is the math your daughter is doing, find her another school

Answer 23

Try again. If you complete the square, and follow the process, you will detect any typo. Seriously, this is a legitimate math question. The solution is simple and more rational if you treat it so.

The FIRST error is IN step 6, not after it. If you had completed the square properly, you would have seen it.