Differentiation Help!!

A piece of string which is 40 cm long is cut into two lengths. Each length is laid out to form a square. Given that the length of the sides of one of the squares is x, find expressions in terms of x for:

A. The length of the sides of the other square
B. The total area enclosed by the two squares.


Ans for A is 10-x and answer for B is ( x^2+ (10-x)^2)

These questions don't require differentiation.

One of the square lengths is x so it's perimeter is 4x which means there's (40-4x)cm of string left for the other square.

Can you carry on from here?

I still didnt really get it actually

I still didnt really get it actually

Which specific part don't you get?

Are the answers yours or are you trying to get to them?

I am trying to get to them and that is really what i dont understand

I am trying to get to them and that is really what i dont understand

It's hard to help you if I don't know where you're stuck.

One of the square lengths is x so it's perimeter is 4x which means there's (40-4x)cm of string left for the other square.

I posted this before. Can you say which part you don't understand?

A diagram might help you here. I'll draw one for you if you really can't get anywhere.

I dont understand why you divide 40-x by 4 to get 10-x