Question

please send me the full method

Answer 1

Dear student
x = 2-√5/2+√5 
on rationalization,
x = (4 + 5 – 4 √5) / – 1
x =   4 √5 – 9
Now similarly y =   – 4 √5 – 9
Now question is asked for x^2 – y^2
 = (x+y) * (x – y)
=  – 18 * 8 √5
= – 144√5

Hope it helps u....
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@TeraBhalaHo

Answer 2

me kyu kru send bta .....
tumhara screw dhila hai matlab ye nhi ni sbhi ka screw dhila hai