SOLUTION: which of the following is a step in the solution of the given equations?
x^2+y^2=65
(1/2)xy=14
a. x+y=121
b.x^2-11x+28=0
c.x^2+2xy+y^2=79
d.11+-(121+112)^(1/2)
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Algebra.Com
Question 145093: which of the following is a step in the solution of the given equations?
x^2+y^2=65
(1/2)xy=14
a. x+y=121
b.x^2-11x+28=0
c.x^2+2xy+y^2=79
d.11+-(121+112)^(1/2)
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2
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
If you try to solve by completing the square, you'll see that in order to get
to be a square on the left hand side, you'll need to add
on both sides. And we are given as
So
(x + y) = (+-)11
I don't see that as any of your choices :(
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