Quadratic Equations

Quantitative Aptitude (SBI-PO)

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35x²-13x-4=0

9y² +9y+2=0

x<=y

x>y

x>=y

the relation cannot be determined

Explanation:

35x²-13x-4=0
35x² – 20x+ 7x-4=0
5x(7x -4) + 1(7x -4)=0
(7x-4) ( 5x+1)=0
x= 4/7 , -1/5
9y² +9y-2=0
9y² +6y+ 3y +2=0
3y( 3y+2) + 1(3y+2)=0
(3y+2) ( 3y+1)=0
y= -2/3,- 1/3
Hence x>y

By: Amit Kumar

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