# How do you find the equation of a line tangent to the function #y=x^3-x^2-4x# at (3,6)?

##### 1 Answer

Jul 22, 2016

#### Explanation:

To find the slope of the tangent, we must use differentiation. The derivative of the function is

so that, at the point

So, we have to find the equation of a straight line passing through

or

or