Question

If x^2 + 2xy + y^2 = 25, x + y > 0 and x - y = 1, then x =

Answer 1

idk

Answer 2

x^2 + 2xy + y^2=(x+y)^2
So, how can we use that?

Answer 3

i guess you can solve for y and then plug in

Answer 4

I had this idea:
x^2 + 2xy + y^2=25
So then:
(x+y)^2=25
So:
x+y=5 OR
x+y=-5
-5 can't be because x+y>0
So then: x+y=5
And using this: x - y = 1
We add them:
2x=6
X=3
Makes sense?

Answer 5

@lawls Does this makes sense?
Feel free to ask! :)

Answer 6

yeah it does. i got the same answer. thanks :)

Answer 7

You are welcome! Glad to help you! :)