X^2+X=38

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Solution for X^2+X=38 equation:


Simplifying
X2 + X = 38

Reorder the terms:
X + X2 = 38

Solving
X + X2 = 38

Solving for variable 'X'.

Reorder the terms:
-38 + X + X2 = 38 + -38

Combine like terms: 38 + -38 = 0
-38 + X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + X + 38 + X2 = 0 + 38

Reorder the terms:
-38 + 38 + X + X2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + X + X2 = 0 + 38
X + X2 = 0 + 38

Combine like terms: 0 + 38 = 38
X + X2 = 38

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.
X + 0.25 + X2 = 38 + 0.25

Reorder the terms:
0.25 + X + X2 = 38 + 0.25

Combine like terms: 38 + 0.25 = 38.25
0.25 + X + X2 = 38.25

Factor a perfect square on the left side:
(X + 0.5)(X + 0.5) = 38.25

Calculate the square root of the right side: 6.184658438

Break this problem into two subproblems by setting 
(X + 0.5) equal to 6.184658438 and -6.184658438.

Subproblem 1

X + 0.5 = 6.184658438 Simplifying X + 0.5 = 6.184658438 Reorder the terms: 0.5 + X = 6.184658438 Solving 0.5 + X = 6.184658438 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 = 6.184658438 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = 6.184658438 + -0.5 X = 6.184658438 + -0.5 Combine like terms: 6.184658438 + -0.5 = 5.684658438 X = 5.684658438 Simplifying X = 5.684658438

Subproblem 2

X + 0.5 = -6.184658438 Simplifying X + 0.5 = -6.184658438 Reorder the terms: 0.5 + X = -6.184658438 Solving 0.5 + X = -6.184658438 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 = -6.184658438 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = -6.184658438 + -0.5 X = -6.184658438 + -0.5 Combine like terms: -6.184658438 + -0.5 = -6.684658438 X = -6.684658438 Simplifying X = -6.684658438

Solution

The solution to the problem is based on the solutions from the subproblems. X = {5.684658438, -6.684658438}

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