ibps-rrb-os1 2021 · Question 140 of 173

I. 𝑥 + 75 4𝑥 = 35 4 II.1 + 32 𝑦2 = 34 3𝑦

Quadratic Equations

Ax = y or no relation.
Bx < yCorrect
Cx ≤ y
Dx > y
Ex ≥ y

Answer: B. x < y

Explanation

I. Multiply by 4x on both side 4x2 + 75 = 35x 4x2 − 35x + 75 = 0 4x2 − 20x − 15x + 75 = 0 4x(x − 5) − 15(x − 5) = 0 (x − 5) (4x − 15) = 0 x = 15 4 , 5 II. Multiply by 3y2 on both sides 3y2 + 96 = 34y 3y2 − 34y + 96 = 0 3y2 − 18y − 16y + 96 = 0 3y(y − 6) − 16(y − 6) = 0 (y − 6) (3y − 16) = 0 y = 16 3 , 6 So, x < y

Source: IBPS RRB PO Mains 2021 Memory Based Paper (Adda247/BankersAdda) · memory-based

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