So i have an equation problem that i need to find the 2nd derivative of, but my understanding of the chain rule is not the best. I tried working it out but i dont know if i did it correctly. i was given the equation y=4(x2+5x)3 So to take the first derivative, i started off by using the chain rule as i understand it and simplified it to: y'=[12(x2+5x)2][2x+5] This is where i start to get confused. I dont really know for certain how im supposed to take the 2nd derivative of that. I assumed that i needed to actually multiply and simplify the first derivative to take the 2nd, but i dont know if what i did or what i got was correct. I simplified the first derivative and ended up with: y'=24x5+60x4+1200x3+3000x2 Then i calculated the 2nd derivative and got: y''=120x4+240x3+3600x2+6000x Would this be correct?