ibps-rrb-os1 2019 · Question 37 of 186

I. x2 – x – 30 = 0 II. y2 + y – 42 = 0

Quadratic Equations

Aif x>y
Bif x<y
Cif x≥y
Dif x≤y
Eif x=y or the relation cannot be established.Correct

Answer: E. if x=y or the relation cannot be established.

Explanation

I. x2 – x – 30 = 0 Pairs = -6, 5 And now dividing by a and by changing the sign we get, x = 6, -5 II. y2 + y – 42 = 0 Pairs = 7, -6 And now dividing by a and by changing the sign we get, y = -7, 6 Hence, relationship cannot be established between x and y. Alternate Method: If sign in constant value is -ve in both the quadratic equation, then relationship cannot be established between two roots.

Source: IBPS RRB PO (Scale 1) Officer 2019 Mains Previous Year Paper — Answer Key & Detailed Solutions (memory-based compilation, ixamBee) · memory-based

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