 Hello and welcome to the session. My name is Mansi and I am going to help you with the following question. The question says, for some constants a and b, find the derivative of ax square plus b the whole square. So let us start with the solution. Let the function fx be equal to ax square plus b the whole square. Let us open the bracket first using the formula x plus y the whole square is equal to x square plus y square plus 2xy. So that would give us a square x raise to power 4 plus b square plus 2abx square. This can be written as a square x raise to power 4 plus 2abx square plus b square. So now we can find out f dash x that is equal to derivative of fx with respect to x that is now we see that a and b are constant. So a square remains as it is derivative of x raise to power 4 with respect to x is 4 into x raise to power 4 minus 1 that is 3 plus 2ab into 2 into x plus 0. This we get because derivative with respect to x of x raise to power n is equal to n into x raise to power n minus 1. This is equal to 4a square x cube plus 4abx. Now from both the terms we can take 4ax common and we have ax square plus b. So our answer to the question is 4ax into ax square plus b. So I hope that you understood the question and enjoyed the session. Have a good day.