RRB NTPC CBT I 20 Jan 2021 Shift 1 Paper

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Question : 36 of 100

Marks: +1, -0

Which of the following is NOT a quadratic equation?

(m ֊ 2)³ = m³ ֊ 4
m(2m + 3) = m² + 1
x(x + 1) + 8 = (x + 2) (x ֊ 2)
(y ֊ 2)² + 1 = 2y ֊ 3

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