I x minus 2 sup2 9 2y 8 sup2 16 ........

Quantitative Aptitude ( CCS) Quadratic Equations

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I. (x − 2)² = 9

????. (2y + 8)² = 16

y ≥ x

y > x

No relation

x ≥ y

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Explanation:

??. x² − 16x + 64 = 0
=> x² − 8x – 8x + 64 = 0
=>x(x − 8) − 8(x − 8) = 0
=> (x − 8) (x − 8) = 0
x = 8, 8
????. y² − 16y + 63 = 0
=>y² − 7y – 9y + 63 = 0
=> y(y − 7) − 9(y − 7) = 0
=> (y – 9) (y – 7) = 0
y = 9, 7
No relation can be established between x & y