Question

Differentiate please

Answer 1

\[y=(u-\sqrt{u})(u+\sqrt{u})\]

Answer 2

multiply them out
\((a+b)(a-b) = a^2 -b^2\)

Answer 3

I am using the product rule

Answer 4

2u ?

Answer 5

is it asked to necessarily use the product rule ?
if not, it would be much easier without the product rule

Answer 6

gf'+fg'

Answer 7

how did u get 2u ?

Answer 8

i got f(x)=u^2-u

Answer 9

so f'(x)= 2u

Answer 10

What is the derivative of u?

Answer 11

zero?

Answer 12

u^2-u is correct
but
its derivative is not just 2u

Answer 13

Nope, cause u is not a constant. Remember if you were to graph u on a graph, it would be a line with a slope of 1.

Answer 14

2u-1

Answer 15

yes, thats correct :)

Answer 16

thanks!

Answer 17

welcome ^_^