 Hello and welcome to the session. My name is Mansi and I'm going to help you with the following question. The question says for some constants a and b, find the derivative of x minus a into x minus b. So let us start with a solution to this question. Let the function fx be equal to x minus a into x minus b. Let us open the bracket first of all. We get x into x is x square, x into minus b is minus bx, minus a into x is minus ax, minus a into minus b is plus a b and this can be written further as x square minus x into a plus b plus a b. Now we can find out f dash x that is dfx by dx that will be equal to 2x into x minus a plus b into 1 plus 0. This happens because we see that a and b are constants so they remain as it is in the second term. In the third term since a b is a constant so this becomes 0. Now in the second term we see that derivative of x with respect to x is 1 so this gets multiplied with 1. Derivative of x square with respect to x is 2x because derivative with respect to x of x raised to power n is equal to n into x raised to power n minus 1. In the first term n is 2 and in the second term n is 1 so derivative is 2x minus a plus b and that can be written as 2x minus a minus b. So this is our answer to the question. I hope that you understood the question and enjoyed the session. Have a good day.