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# Help with C2 Differentiation question watch

1. Hello lovely internet people, can someone explain how you solve this question?

Tanks!
Hello lovely internet people, can someone explain how you solve this question?

Tanks!
i am confuse i don't quite understand the expand the y-coordinate bit :/ doesn't quite make sense to me..
Kvothe the arcane ZackenStudent403
Hello lovely internet people, can someone explain how you solve this question?

Tanks!
You know that so that . (i.e: wherever you see , replace it with ). Expand the square and write out all the terms.
4. Coordinate of y when x = x is 3x2+1

The question is asking you to replace x here with x+dx and expand to get this new y coordinate (y+dy) in terms of x and dx
5. (Original post by Zacken)
You know that so that . (i.e: wherever you see , replace it with ). Expand the square and write out all the terms.
9.5/14

6. (Original post by thefatone)
i am confuse i don't quite understand the expand the y-coordinate bit :/ doesn't quite make sense to me..
Kvothe the arcane ZackenStudent403
Please do not tag so many people at the same time.

As you can see 3 separate people have gone through the effort of answering the same question and that is unnecessary time wasted.

EDIT: KtA has now deleted his answer having seen 2 other people answer the question, which just wastes his time.
7. (Original post by Student403)
Please do not tag so many people at the same time.

As you can see 3 separate people have gone through the effort of answering the same question and that is unnecessary time wasted.

EDIT: KtA has now deleted his answer having seen 2 other people answer the question, which just wastes his time.
sorry
8. (Original post by Zacken)
You know that so that . (i.e: wherever you see , replace it with ). Expand the square and write out all the terms.
How do you do the next part?
How do you do the next part?
As they said... plug this into the formula given for .
10. (Original post by thefatone)
sorry
That's alright. Didn't mean it harshly if it sounded that way
11. Nice.

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