RRB Paramedical Staff Nurse Model Paper 3

Question : 56 of 100

Marks: +1, -0

In each of these questions, two equation (I) and (II) are given. You have to solve both the equations and give answer
I.

6 x^{2}+77 x+121=0

II.

y^{2}+9 y-22=0

Solution:

6 x^{2}+77 x+121=0

or,

6 x^{2}+66 x+11 x+121=0

or,

6 x(x+11)+11(x+11)=0

or,

(6 x+11)(x+11)=0

or,

x=-\;{11}/{6},-11

II.

y^{2}+9 y-22=0

or,

y^{2}+11 y-2 y-22=0

or,

y(y+11)-2(y+11)

or,

(y-2)(y+11)=0

or,

y=2,-11

Hence, no relationship can be established between x and y

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