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# C4 Implicit Differentiation problem watch

1. How would you find for this question:

Here's what I've done so far:

Is this correct? If so, how do you make dy/dx the subject?

Thanks
2. You can also do it by expanding those brackets
3. Which brackets do you mean?

Is the working that I've done correct?
4. Looks right to me.

But what do I know, I just started doing this :P
5. looks fine to me

6. (Original post by Pheylan)
looks fine to me

The answer at the back of the book is:

Is this wrong?
7. your working so far is correct, I think the next step is to multiply out or expand all the brackets, then get all the terms that are multiples of dy/dx on 1 side, the others on the other side, then you can factorise one side as they are all multiples of dy/dx. andonce you have factorised, make dy/dx the subject of the formula, by dividing ( i hope this helps im not very good at explanations)
8. (Original post by Pheylan)
looks fine to me

I don't think that's right.
9. (Original post by fireice7)
The answer at the back of the book is:

Is this wrong?
No, I got that answer, it's correct.

It's just a case of being careful with your re-arranging.
No, I got that answer, it's correct.

It's just a case of being careful with your re-arranging.
How would you re-arrange it, (if pheylan's way is wrong) I'm still stuck at the line in my original post.
11. (Original post by Pheylan)
looks fine to me

fixed:

12. (Original post by Pheylan)
fixed:

how did you get from the first to the second line ??

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