4=X^2+X

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Solution for 4=X^2+X equation:


Simplifying
4 = X2 + X

Reorder the terms:
4 = X + X2

Solving
4 = X + X2

Solving for variable 'X'.

Reorder the terms:
4 + -1X + -1X2 = X + -1X + X2 + -1X2

Combine like terms: X + -1X = 0
4 + -1X + -1X2 = 0 + X2 + -1X2
4 + -1X + -1X2 = X2 + -1X2

Combine like terms: X2 + -1X2 = 0
4 + -1X + -1X2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-4 + X + X2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + X + 4 + X2 = 0 + 4

Reorder the terms:
-4 + 4 + X + X2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + X + X2 = 0 + 4
X + X2 = 0 + 4

Combine like terms: 0 + 4 = 4
X + X2 = 4

The X term is X.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + X2 = 4 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + X2 = 4 + 0.25

Combine like terms: 4 + 0.25 = 4.25
1.25 + X2 = 4.25

Factor a perfect square on the left side:
(X + 0.5)(X + 0.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(X + 0.5) equal to 2.061552813 and -2.061552813.

Subproblem 1

X + 0.5 = 2.061552813 Simplifying X + 0.5 = 2.061552813 Reorder the terms: 0.5 + X = 2.061552813 Solving 0.5 + X = 2.061552813 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + X = 2.061552813 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = 2.061552813 + -0.5 X = 2.061552813 + -0.5 Combine like terms: 2.061552813 + -0.5 = 1.561552813 X = 1.561552813 Simplifying X = 1.561552813

Subproblem 2

X + 0.5 = -2.061552813 Simplifying X + 0.5 = -2.061552813 Reorder the terms: 0.5 + X = -2.061552813 Solving 0.5 + X = -2.061552813 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + X = -2.061552813 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = -2.061552813 + -0.5 X = -2.061552813 + -0.5 Combine like terms: -2.061552813 + -0.5 = -2.561552813 X = -2.561552813 Simplifying X = -2.561552813

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.561552813, -2.561552813}

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