SOLUTION: If x+y=6, xy=9, then x2+y2 is equal to_____?

SOLUTION: If x+y=6, xy=9, then x2+y2 is equal to_____?

Algebra.Com

Question 479633: If x+y=6, xy=9, then x2+y2 is equal to_____?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
(x+y)=6
xy=9
(x+y)^2=36
x^2+2xy +y^2=36
xy =9
x^2+18+y^2=36
x^2+y^2=36-18
x^2+y^2=18
m.ananth@hotmail.ca
RELATED QUESTIONS
if x2+y2=85 and xy=9 what is (x+y)2 *the 2 behind means to the second power i... (answered by mananth)

x/4 =6/5 then... (answered by Fombitz)

x/x2+xy + y/x2-y2 + x+y/xy+y2 = ... please show the ways to.. thank... (answered by Fombitz)

If X2-Y2=28 and X-Y=8 then the average of X and Y... (answered by fractalier)

If xy=-3 and x2+ y2=12 then (x-y)2=? note: the "2" behind the varibles mean squared. and (answered by jawaidak)

If variable point (x, y) satisfies the equation x2 + y2 � 8x � 6y + 9 = 0, then range of (answered by Fombitz)

x2 + y2 = 9 x + y =... (answered by Alan3354)

If x+y+z=12,x2+y2+z2=64,find... (answered by ikleyn)

If 2log(x+y)=logx+logy+4log2, then show that x2+y2=14xy (answered by vleith)