Question

....

Answer 1

squaring all that stuff and getting a negative number - holy moly!!

Answer 2

Yeah its confusing

Answer 3

first step
\[ \frac{d}{dy}\left(5x^2 + y^4\right) = \frac{d}{dy}−9\]

Answer 4

.

Answer 5

Okay would I implicitly derive that?

Answer 6

Actually what bugs me is (2,1) is not a point on the curve!
Could it be that
5x^2 + y^4 = −19 and the point is (2i, 1)?

Answer 7

good catch by mathmate. It does look like a typo.

**Okay would I implicitly derive that?***
yes

Answer 8

I would also double check the problem, because it looks like there are typos.

Answer 9

Thats what the question says.