UPSC CDS 2 2019 Math Paper

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Question : 87 of 100

Marks: +1, -0

If x=

1+√3

2

and y=x3,then y satisfies which one of the following equations ?

[2019 CDS-II]

8y2−20y−1=0
8y2+20y−1=0
8y2+20y+1=0
8y2−20y+1=0

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