Question

find the value of

if a=5-2√5 then find a²​

Answer 1

Answer:

I don't know u that y I can't tell answer

Answer 2

Answer:

a = ( 5 - 2√5)

both side squaring

a²= (5 -2√5)²

a²= 25 - 20√5 + 20

a²= 45-20√5

a²= 5(9 - 4√5)