Quadratic Equations

Quantitative Aptitude ( CCS)

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x² + x = 56

y² – 17y + 72 = 0

x<=y

x>y

x>=y

Explanation:

x² + x = 56
x² + 8x – 7x -56 = 0
x(x+8) -7 (x+8) =0
(x+8) (x-7) =0
x= -8 , 7
y² – 17y + 72 = 0
y² – 9y – 8y + 72 =0
y(y-9) -8(y-9) = 0
(y-9) (y-8) =0
y= 9, 8
x < y

By: Amit Kumar

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