Question

please help me to find the answer as fast as possible
​

Answer 1

Which one you want in that

Answer 2

Answer:

in Q number 4

3+√2/3-√2=a+b√2

multiply with conjugate

(9+2+6√2)/(9-2)=a+b√2

11+6√2/7=a+b√2

now compair

a=11/7

b=6/7