Question

Q4)) The expression x4 – 2x2 + k will be a perfect square when the value of k is
A)2
B)1
C)-1
D)–2

step by step explain​

Answer 1

Answer:

what is sadness ??

ᵤₛₑᵣ ᵢₙ dₑₚᵣₑₛₛᵢₒₙ

what is depression ?

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Answer 2

Answer:

k=1

Step-by-step explanation:

1 . x^4-2x^2+1

=(x^2-1)^2