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समीकरण 25x^(2) - 2xy + (1)/(25) y^(2) = ...

समीकरण `25x^(2) - 2xy + (1)/(25) y^(2) = (5x + ky)^(2)` सत्य होगा, जब k का मान है :

A

`(1)/(5)`

B

`-(1)/(5)`

C

1

D

`-1`

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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