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The expression x^(4) + 2 x ^(2) + k wi...

The expression ` x^(4) + 2 x ^(2) + k` will be a perfect square when the value of k is

A

1

B

0

C

`1/4`

D

`1/2`

Text Solution

Verified by Experts

The correct Answer is:
A
`x^(4)-2x^(2)+k`
= `(x^(2))^(2)-2xx1xx(x)^(2)+(1)^(2)`
`rArrk=sqrt1`
`rArrk=1`
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