Question

differentiate
\[y=(\frac{ 6 }{ x }+x)(\frac{ 6 }{ x }-x)\]

Answer 1

expand then differentiate...

Answer 2

difference of squares...

Answer 3

\[\frac{ 36 }{ x^2 }-x^2\]

Answer 4

then do you
\[36x ^{-2}-X^2\]
which then turns to
\[-72x ^{-3}-2x\]
then
\[-\frac{ 72 }{ x ^{3} }-2x\]