यदि x^(4) + x^(2) y^(2) + y^(4) = (21)/(...

यदि `x^(4) + x^(2) y^(2) + y^(4) = (21)/( 256)` और `x^(2) + xy + y^(2) = (3)/(16)` है, तो `2 (x^(2) + y^(2) )=?`

A

`(5)/(16)`

B

`(3)/(8)`

C

`(3)/(4)`

D

`(5)/(8)`

लिखित उत्तर

Verified by Experts

The correct Answer is:

D

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