I was following an example in my text, and there was one step I got stuck on.
Given $\frac{2x(\Delta x) + (\Delta x)^{2}}{\Delta x}$, how does the denominator cancel out to produce $2c+\Delta x$?
My thinking is that the formula expands to $\frac{2x(\Delta x) + (\Delta x * \Delta x)}{\Delta x}$, but how does the denominator cancel out on both sides of the + sign if the numerator is one formula?
*Edited the formula to be multiplication instead of addition