Latest book Aptitude Question SOLUTION: If xy=-3 and x2+ y2=12 then (x-y)2=? note: the "2" behind the varibles mean squared. and the (x-y)2 means squared. thanks Dean xy=-3 2xy=-6 x2+y2=12 x2+y2-2xy=12-2xy (x-y)2=12-*-6

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(#M40150645) BOOK Numerical Ability question Keep an EYE

If xy=-3 and x2+ y2=12 then (x-y)2=?
note: the "2" behind the varibles mean squared. and the (x-y)2 means squared.
thanks
Dean
xy=-3
2xy=-6
x2+y2=12
x2+y2-2xy=12-2xy
(x-y)2=12-*-6
(x-y)2=12+12
(x-y)2=24

Asked In book (9 years ago)

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