SATHEE: Quantitative Aptitude Ques 1529

Quantitative Aptitude Ques 1529

Question: Directions: In these given questions two equations are given. You have to solve both the equations and give answer. [IBPS RRB (Office Assistant) 2014]

I. $ x^{2}+3x-28=0 $
II. $ y^{2}-y-20=0 $

Options:

A) If $ x\le y $

B) If $ x>y $

C) If $ x<y $

D) If $ x\ge y $

E) If $ x=y $ or relationship cannot be established

Show Answer

Answer:

Correct Answer: C

Solution:

(c) I. $ x^{2}+3x-28=0 $

$ \Rightarrow $ $ x^{2}+7x-4x-28=0 $
$ \Rightarrow $ $ x(x+7)-4(x+7)=0 $
$ \Rightarrow $ $ (x+7)(x-4)=0 $

$ \therefore $ $ x=-,7, $ $ 4 $ II. $ y^{2}-y-20=0 $

$ \Rightarrow $ $ y^{2}-5y+4y-20=0 $
$ \Rightarrow $ $ y(y-5)+4(y-5)=0 $
$ \Rightarrow $ $ (y+4)(y-5)=0 $

$ \therefore $ $ y=-4, $ $ 5 $ Hence, $ x<y $

Quantitative Aptitude Ques 1528

Quantitative Aptitude Ques 1530

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