SOLUTION: Find the real solutions of teh system of equations: x^2 + y^2 = 4 2x + y = 0 Thanks!

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Question 295038: Find the real solutions of teh system of equations:
x^2 + y^2 = 4
2x + y = 0
Thanks!
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
y=-2x
x^2+(-2x)^2=4
x^2+4x^2=4
5x^2=4
x^2=4/5
x=+-2/sqrt(5)
x=+2sqrt(5)/5
x=-2sqrt(5)/5
y=-2x