X^2-2x+y^2+4y-21=0

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Solution for X^2-2x+y^2+4y-21=0 equation: 


Simplifying
X2 + -2x + y2 + 4y + -21 = 0

Reorder the terms:
-21 + X2 + -2x + 4y + y2 = 0

Solving
-21 + X2 + -2x + 4y + y2 = 0

Solving for variable 'X'.

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

Add '21' to each side of the equation.
-21 + X2 + -2x + 4y + 21 + y2 = 0 + 21

Reorder the terms:
-21 + 21 + X2 + -2x + 4y + y2 = 0 + 21

Combine like terms: -21 + 21 = 0
0 + X2 + -2x + 4y + y2 = 0 + 21
X2 + -2x + 4y + y2 = 0 + 21

Combine like terms: 0 + 21 = 21
X2 + -2x + 4y + y2 = 21

Add '2x' to each side of the equation.
X2 + -2x + 4y + 2x + y2 = 21 + 2x

Reorder the terms:
X2 + -2x + 2x + 4y + y2 = 21 + 2x

Combine like terms: -2x + 2x = 0
X2 + 0 + 4y + y2 = 21 + 2x
X2 + 4y + y2 = 21 + 2x

Add '-4y' to each side of the equation.
X2 + 4y + -4y + y2 = 21 + 2x + -4y

Combine like terms: 4y + -4y = 0
X2 + 0 + y2 = 21 + 2x + -4y
X2 + y2 = 21 + 2x + -4y

Add '-1y2' to each side of the equation.
X2 + y2 + -1y2 = 21 + 2x + -4y + -1y2

Combine like terms: y2 + -1y2 = 0
X2 + 0 = 21 + 2x + -4y + -1y2
X2 = 21 + 2x + -4y + -1y2

Simplifying
X2 = 21 + 2x + -4y + -1y2

Reorder the terms:
-21 + X2 + -2x + 4y + y2 = 21 + 2x + -4y + -1y2 + -21 + -2x + 4y + y2

Reorder the terms:
-21 + X2 + -2x + 4y + y2 = 21 + -21 + 2x + -2x + -4y + 4y + -1y2 + y2

Combine like terms: 21 + -21 = 0
-21 + X2 + -2x + 4y + y2 = 0 + 2x + -2x + -4y + 4y + -1y2 + y2
-21 + X2 + -2x + 4y + y2 = 2x + -2x + -4y + 4y + -1y2 + y2

Combine like terms: 2x + -2x = 0
-21 + X2 + -2x + 4y + y2 = 0 + -4y + 4y + -1y2 + y2
-21 + X2 + -2x + 4y + y2 = -4y + 4y + -1y2 + y2

Combine like terms: -4y + 4y = 0
-21 + X2 + -2x + 4y + y2 = 0 + -1y2 + y2
-21 + X2 + -2x + 4y + y2 = -1y2 + y2

Combine like terms: -1y2 + y2 = 0
-21 + X2 + -2x + 4y + y2 = 0

The solution to this equation could not be determined.

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