Does xy=x^2 ??
1) xy=y^2
2) x^2 = y^2
shouldnt A be the answer. xy=y^2 is possible only when x=y and if x=y then xy=x^2.
am i missing something?
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Does xy=x^2
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sandeep_chhabra
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sandeep_chhabra
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simplyjat
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xy = y^2 is also possible when y = 0 and x can take any value...sandeep_chhabra wrote:Does xy=x^2 ??
1) xy=y^2
2) x^2 = y^2
shouldnt A be the answer. xy=y^2 is possible only when x=y and if x=y then xy=x^2.
am i missing something?
simplyjat
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netigen
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The questions is asking is xy=x^2
or x^2-xy =0
which means either x=0 or x=y?
from (a)
xy=y^2
xy-y^2=0
so y=0 or x=y Insufficient
from (b)
x^2=y^2
so + or -(x)=+or - (y) Insufficient
both (a) and (b) are together sufficient to answer the question because only when x=y the two equations will be true
or x^2-xy =0
which means either x=0 or x=y?
from (a)
xy=y^2
xy-y^2=0
so y=0 or x=y Insufficient
from (b)
x^2=y^2
so + or -(x)=+or - (y) Insufficient
both (a) and (b) are together sufficient to answer the question because only when x=y the two equations will be true
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sandeep_chhabra
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