x^2+y^2-4=0

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Solution for x^2+y^2-4=0 equation:


Simplifying
x2 + y2 + -4 = 0

Reorder the terms:
-4 + x2 + y2 = 0

Solving
-4 + x2 + y2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '4' to each side of the equation.
-4 + x2 + 4 + y2 = 0 + 4

Reorder the terms:
-4 + 4 + x2 + y2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + x2 + y2 = 0 + 4
x2 + y2 = 0 + 4

Combine like terms: 0 + 4 = 4
x2 + y2 = 4

Add '-1y2' to each side of the equation.
x2 + y2 + -1y2 = 4 + -1y2

Combine like terms: y2 + -1y2 = 0
x2 + 0 = 4 + -1y2
x2 = 4 + -1y2

Simplifying
x2 = 4 + -1y2

Reorder the terms:
-4 + x2 + y2 = 4 + -1y2 + -4 + y2

Reorder the terms:
-4 + x2 + y2 = 4 + -4 + -1y2 + y2

Combine like terms: 4 + -4 = 0
-4 + x2 + y2 = 0 + -1y2 + y2
-4 + x2 + y2 = -1y2 + y2

Combine like terms: -1y2 + y2 = 0
-4 + x2 + y2 = 0

The solution to this equation could not be determined.

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