SarkariPYQ

SSC CGL 2018 PYQ — Question 18

SSC CGL Tier II Quant - 09/03/2018 • Quantitative Aptitude • Q18

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If  and , then which of the following can be the value of X + Y.

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Correct answer: B

Explanation

The correct option is 2.

or, 

or, X (2 + X) = 1 + X.

or, 2X + X2 = 1 + X.

or, X2 + X − 1 = 0.

or, 

And,

or,

or, Y (3 + 2Y ) = 2 + 2Y

or, 3Y + 2Y2 = 2 + Y.

or, 2Y2 + Y − 2 = 0

or, 

So, X + Y = .(by taking positive roots.)

B is correct choice.