SOLUTION: Solve the system for x and y y -2x = 0 x^2 + y^2 = 5

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Question 385523: Solve the system for x and y
y -2x = 0
x^2 + y^2 = 5
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

solving the system by Substitution

y -2x = 0  Or   y = 2x

x^2 + y^2 = 5

x^2 + (2x)^2 = 5

x^2 + 4x^2 = 5

   5x^2 = 5

    x^2 = 1

     x = ± 1

     y = ± 2