If x2, x, -8 are in AP, then which one of the following is correct?

1.	If x2, x, -8 are in AP, then which one of the following is correct?
A.	x ∈ {-2}
B.	x ∈ {4}
C.	x ∈ {-2, 4}
D.	x ∈ {-4, 2}
Answer» D. x ∈ {-4, 2}

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If x2, x, -8 are in AP, then which one of the following is correct?

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