Hey id be greatful to anyone who can help me with this which i guess is easy but im too dumb to get...
Whilst finding the derivative of x^{2} (using the difference quotient) it is at this step that i get confused and need help on...
f'(x)= (x+dx)^{2}-(x)^{2}/dx
how do they get from the above equation to......
x^{2}+2xdx+(dx^{2})-(x)^{2}/dx
any explanation of this would be great, cheers