How do you differentiate this

In differentaition, it is all about multiplying and taking away. Look at the first integer and the number that it is in the power off. You have to simply times the integer with the power of number and then deduct one from the power off. For example, if you have to differentiate 3x²  - The integer is 3, the power of is 2. You times 3 by 2 to get six and you get 1 so (2-1) from the power of to get 6x¹ 

However as it is to the power of 1, you do not need to write 1 and the answer is simply 6x