The function is
and the point is
.

Apply derivative on each side with respect to
.


Apply power rule of differentiation:
.
Apply product rule of differentiation :
.






.
Find the slope
at point
.
Slope of the tangent at point is the derivative of the function at that point.
\\
Substitute
and
in
.




.
.
Slope of the tangent at point
is
.
Find the tangent line equation.
\Point-slope form of line equation
.
Substitute
and
in the point slope form.
.
The tangent line equation is
.
The tangent line equation is
.