ibps-rrb-os1 2017 · Question 53 of 74

I. 2x2 + 9x + 7 = 0 II. y2 + 4y + 4 = 0

Quantitative Aptitude (misc)

Aif x>y
Bif x≥y
Cif x<y
Dif x ≤y
Eif x = y or no relationship can be established.Correct

Answer: E. if x = y or no relationship can be established.

Explanation

I. 2𝑥2 + 9𝑥 + 7 = 0 2𝑥2 + 7𝑥 + 2𝑥 + 7 = 0 𝑥(2𝑥 + 7) + 1(2𝑥 + 7) = 0 (𝑥 + 1)(2𝑥 + 7) = 0 𝑥 = −1, − 7 2 II. 𝑦2 + 4𝑦 + 4 = 0 𝑦2 + 2𝑦 + 2𝑦 + 4 = 0 𝑦(𝑦 + 2) + 2(𝑦 + 2) = 0 (𝑦 + 2)(𝑦 + 2) = 0 𝑦 = −2, −2 ∴ No relation.

Source: IBPS RRB PO Prelims 2017 Memory Based Paper (Adda247) · memory-based

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