SATHEE: Quantitative Aptitude Ques 127

Quantitative Aptitude Ques 127

Question: Directions: In the following question, two equations numbered I and II are given. You have to solve both the equations and mark the appropriate answer. [IBPS (Officer Recruitment) 2015]

Give answer I. $ x^{2}-3x-88=0 $ II. $ y^{2}+8y-48=0 $

Options:

A) if $ x\ge y $

B) if $ x\le y $

C) if $ x<y $

D) if $ x>y $

E) if relationship between x and y cannot be established

Show Answer

Answer:

Correct Answer: D

Solution:

I. $ x^{2}-3x-88=0 $

$ \Rightarrow $ $ x^{2}-11x+8x-88=0 $

$ \Rightarrow $ $ x,(x-11)+8,(x-11)=0 $

$ \Rightarrow $ $ (x+8)(x-11)=0 $

$ \Rightarrow $ $ x=-,8,or,11 $ II. $ y^{2}+8y-48=0 $

$ \Rightarrow $ $ y^{2}+12y-4y-48=0 $

$ \Rightarrow $ $ y,(y+12)-4,(y+12)=0 $

$ \Rightarrow $ $ (y-4)(y+12)=0 $
$ \Rightarrow $ $ y=-12or4 $ Hence, x > y

Quantitative Aptitude Ques 126

Quantitative Aptitude Ques 128

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