SOLUTION: if x2+y2=85 and xy=9 what is (x+y)2 *the 2 behind means to the second power i couldn't get it 2 show properly

SOLUTION: if x2+y2=85 and xy=9 what is (x+y)2 *the 2 behind means to the second power i couldn't get it 2 show properly

Algebra.Com

Question 547136: if x2+y2=85
and xy=9
what is (x+y)2
*the 2 behind means to the second power i couldn't get it 2 show properly
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
if x2+y2=85
and xy=9
what is (x+y)2
add 2xy to both sides

x^2+2xy+y^2=85+2xy
(x+y)^2= 85+2*9
(x+y)^2=103
RELATED QUESTIONS
If xy=-3 and x2+ y2=12 then (x-y)2=? note: the "2" behind the varibles mean squared. and (answered by jawaidak)

Given f(x) = x2 + 2x + 2, find f(0) THE x2 is really supposed to be x with a little... (answered by scott8148)

Please help me solve this question If x2 - 2y2 = 7 and xy = 3 , find x and y Note : (answered by ikleyn,solver91311)

x2 + y2 -8519.454x - 16451.344y + 85750785=0 where x2 means x to the second... (answered by astromathman)

Find all points having an x-coordinate of 2 whose distance from the point... (answered by josgarithmetic)

1) a) write 1/x-3 - 1/x as single fraction in its simplest form b) use your answer to... (answered by Alan3354)

Ok, I know this should be easy, but i forget how to do this type of question when the... (answered by Earlsdon)

Please help me to obtain the derivative. for given: Y=x^2-4X+5 I think the original... (answered by stanbon)

xy-y2+zy divided by yz2 if x=6,y=-2,and z=3 the 2 mean the second power that's beside (answered by josgarithmetic)