Question

If a = 2+√5/2-√5 and b = 2-√5/2+√5, then find the value of a2-b2

Answer 1

a2-b2 means (a+b)(a-b),,,,put the value of a and b in this....

and then u get the result..easily....

by solving (a+b) u should get 4 ...and solving (a-b) u should get...- under root 5

and then multiple 4 by - under root 5

RESULTS  -4under root 5.....

I HOPE IT HELPS U..

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Answer 2

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