# How do you simplify #(sqrt(7) + sqrt(5))^4 + (sqrt(7) - sqrt(5))^4#?

##### 1 Answer

Okay i should thank you for such a question

OK lets start

Call

So lets rewrite you equation as

So lets take the first part and simplify

So lets substitute

Square this gain and you will get that

Similarly repeat the above steps for

After substituting you should get that the above equation is

So finally lets put the puzzle together

Hope that this is what you wanted if this is what you wanted please write down in the comments