1. The problem statement, all variables and given/known data Hi guys, need some help finding the common tangent of two curves. Two curves y = 3X3+6X2+6X+3 and y = 3X3+6X+3 touch each other. Find the common tangent. 2. Relevant equations y = 3X3+6X2+6X+3 and y = 3X3+6X+3 3. The attempt at a solution well i made the two equations equal each other and then i found the X values. After that i subbed the values in the the original equations to get my y values. My points ended up being (0,3) and (-1,0) is the correct? what do i do after this? First time with calculus so not sure what to do.