Discriminant

IFoundWonderland

What have I done wrong?

Need to find the value of k.

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Reply 1

Serine Soul

Watch your signs! :tongue:

Reply 2

drowzee

It's just that you took the '+17' to the other side, so it becomes -17 :smile:

Reply 3

username1507561

Super simple, you shifted the 17 to the other side of the '=' sign without making it negative

Reply 4

TeeEm

Original post by IFoundWonderland

What have I done wrong?

Need to find the value of k.

Reply 5

Student403

Original post by TeeEm

I really get annoyed at that

Reply 6

TeeEm

Original post by Student403

I really get annoyed at that

even worse ... I do not understand why does it happen?

Reply 7

Student403

Original post by TeeEm

even worse ... I do not understand why does it happen?

Perhaps for people living on the equator where the ground is sideways

Reply 8

IFoundWonderland

Original post by enaayrah

Watch your signs! :tongue:

Original post by drowzee

It's just that you took the '+17' to the other side, so it becomes -17 :smile:

Original post by zoolita

Super simple, you shifted the 17 to the other side of the '=' sign without making it negative

rofl 15 years of maths and I make the stupidest mistake :lol:

I was looking at it for ages trying to figure out where I went wrong. Thanks so much :awesome:

Original post by TeeEm

I suppose I could've rotated it.

Also:

Reply 9

TeeEm

Original post by Student403

Perhaps for people living on the equator where the ground is sideways

I guess ...

Reply 10

IFoundWonderland

Original post by Student403

I really get annoyed at that

Original post by Student403

Perhaps for people living on the equator where the ground is sideways

Original post by TeeEm

even worse ... I do not understand why does it happen?

I tried to rotate the second pic and my phone wouldn't let me.

Reply 11

Student403

Original post by IFoundWonderland

I tried to rotate the second pic and my phone wouldn't let me.

I didn't spot any mistakes? That answer would make sense if the coefficient a was positive

(edited 8 years ago)

Reply 12

IFoundWonderland

Original post by Student403

I didn't spot any mistakes? That answer would make sense if the coefficient a was positive

So do you think it was a mistake in the textbook answers? *fingers crossed*

Reply 13

Student403

Original post by IFoundWonderland

So do you think it was a mistake in the textbook answers? *fingers crossed*

I think so

But get confirmation from the god himself @TeeEm

Btw it would be minus 17/16

Reply 14

Muttley79

Original post by IFoundWonderland

I tried to rotate the second pic and my phone wouldn't let me.

Check the question - is the coefficient of the quadratic term negative?

At the end did you remember to subtract 17 from both sides? You seem to have a positive answer ...

Reply 15

TeeEm

Original post by Student403

I think so

But get confirmation from the god himself @TeeEm

you called my Lord ?

Reply 16

Kevin De Bruyne

Original post by TeeEm

even worse ... I do not understand why does it happen?

Technology is a nasty business. What appears right side up on your phone or tablet or even your computer is secretly the wrong way round unless you take it the right way round on your device. :redface:

Also, can't rep you (as always) for your funny cat photo. :toofunny:

Reply 17

Student403

Original post by TeeEm

you called my Lord ?

Sir in the second pic of hers, is she correct in her working and the answer is wrong?

(Except that she missed the minus at the end)

Reply 18

TeeEm

Original post by SeanFM

Also, can't rep you (as always) for your funny cat photo. :toofunny:

I do not own a smart phone ...
I take pictures with a camera or scanner.

Reply 19

IFoundWonderland

Original post by Student403

I think so

But get confirmation from the god himself @TeeEm

Btw it would be minus 17/16

Yeah I realised when I checked but didn't write it down because was irrelevant to the correct answer they've provided. I'm just going to double check the question. Thanks :h:

Original post by Muttley79

Check the question - is the coefficient of the quadratic term negative?

At the end did you remember to subtract 17 from both sides? You seem to have a positive answer ...