Question

if.
a=2-√5/2+√5
y=2+√5/2+√5, find a²-b²​

Answer 1

Answer:

As a=2−52+5, so,

a2=(2−5)2(2+5)2

=9−459+45

And as b=2+52−5, then,

b2=(2+5)2(2−5)2

=9+459−45

Now,

a2−b2=9

Answer 2

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