that's not what i'd do.

i suppose you mean, ??

in that case, just combine the fractions in the numerator and simplify

if you want to multiply the top and bottom by something, multiply by 2x (the LCD of the fractions in the numerator). it's the equivalent of combining the fractions

well, what can i say, but try again. make sure you have the right formula this time. it helps to write out the formula using letters, like a to represent (4 + h) and b to represent ( ) then erase them and write in he expressions and simplify2) lim (4+h)^3 - 64 / h

h->0

I tried sum of cubes and got lost haha. I did the steps in that but the 64 is messing me up.

Any help would be great