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

Algebra ->  College  -> Linear Algebra -> 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      Log On


   

Question 9376: 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
Answer by jawaidak(3) About Me  (Show Source):
You can put this solution on YOUR website!
xy=-3
2xy=-6
x2+y2=12
x2+y2-2xy=12-2xy
(x-y)2=12-2*-3
(x-y)2=12+6
(x-y)2=18