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Saturday, November 17, 2018

If (x:y)=2: 1,then(x^2-y^2): (x^2+ y^2) is

If(x:y)=2:1,then(x2y2):(x2+y2)is:
A3:5
B5:3
C1:3
D3:1

Correct Answer: 3:5

Explanation:

xy=21 (Given)

Expression=x2y2x2+y2=x2y21x2y2+1

=(21)21(21)2+1=414+1=35

Nithin K
answered Apr 17 '2018 at 21:20

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