If x = 3y, is x^2 y^2? (1) y + x

Question

If  x = 3y , is  x^2 > y^2 ?

(1)  y+x < yx

(2)  x^2 = 9y^2

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chetan2u · Answer

If x = 3y , is x^2 > y^2 ? x^2 > y^2 means (3y)^2>y^2....8y^2>0....y eq{0} So, we have to find whether y=0. (1) y+x < yx If y=0, y+x < yx becomes 0+0<0*0....0<0 ..NOT possible. Hence y eq{0} (2) x^2 = 9y^2 x=3y means the same. No new information. A

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If x = 3y, is x^2 > y^2? (1) y + x < yx (2) x^2 = 9y^2

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