defence exam Indian Coast Guard Assistant Commandant (GD/CPL) 2025 Test Series Mathematics Sets

Which of the following is the roster form of the set A = {4x2 - x - 5 = 0 : x ∈ I}

1
{1, -1.25}
2
{1} 
3
{-1, 1.25}
4
{-1}
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