IBPS SO Prelims Exam Model Paper 6

I. 4 x2 + 29x + 45 = 0
⇒ 4x2 + 9x + 20x + 45 = 0
⇒ x(4x + 9) + 5 (4x + 9) = 0
⇒ (x + 5) (4x + 9) = 0
⇒ x = - 5, −

9

4

II. 21 y2 + 80y + 11 = 0
⇒ 21y2 + 77y + 3y + 11 = 0
⇒ 7y (3y + 11) + 1 (3y + 11) = 0
⇒ (3y + 11) (7y + 1) = 0
⇒ y = −

11

3

, −

1

7

Hence, the relationship between x and y cannot be established.