if x+y=12 and xy=14 :find the value of xsquare +y square
x+y =12
xy =14; x2+y2 =?
using the identity (a+b)2 =a2+b2 +2ab
(x+y)2 =x2 +y2 +2xy
(12)2 =x2+y2+2(14)
144 =x2+y2+28
144-28 =x2+y2
therefore x2+ y2 =116
if x+y=12 and xy=14 :find the value of xsquare +y square
x+y =12
xy =14; x2+y2 =?
using the identity (a+b)2 =a2+b2 +2ab
(x+y)2 =x2 +y2 +2xy
(12)2 =x2+y2+2(14)
144 =x2+y2+28
144-28 =x2+y2
therefore x2+ y2 =116