x^2+2x=26.01

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Solution for x^2+2x=26.01 equation:


Simplifying
x2 + 2x = 26.01

Reorder the terms:
2x + x2 = 26.01

Solving
2x + x2 = 26.01

Solving for variable 'x'.

Reorder the terms:
-26.01 + 2x + x2 = 26.01 + -26.01

Combine like terms: 26.01 + -26.01 = 0.00
-26.01 + 2x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '26.01' to each side of the equation.
-26.01 + 2x + 26.01 + x2 = 0.00 + 26.01

Reorder the terms:
-26.01 + 26.01 + 2x + x2 = 0.00 + 26.01

Combine like terms: -26.01 + 26.01 = 0.00
0.00 + 2x + x2 = 0.00 + 26.01
2x + x2 = 0.00 + 26.01

Combine like terms: 0.00 + 26.01 = 26.01
2x + x2 = 26.01

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 26.01 + 1

Reorder the terms:
1 + 2x + x2 = 26.01 + 1

Combine like terms: 26.01 + 1 = 27.01
1 + 2x + x2 = 27.01

Factor a perfect square on the left side:
(x + 1)(x + 1) = 27.01

Calculate the square root of the right side: 5.197114584

Break this problem into two subproblems by setting 
(x + 1) equal to 5.197114584 and -5.197114584.

Subproblem 1

x + 1 = 5.197114584 Simplifying x + 1 = 5.197114584 Reorder the terms: 1 + x = 5.197114584 Solving 1 + x = 5.197114584 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 5.197114584 + -1 Combine like terms: 1 + -1 = 0 0 + x = 5.197114584 + -1 x = 5.197114584 + -1 Combine like terms: 5.197114584 + -1 = 4.197114584 x = 4.197114584 Simplifying x = 4.197114584

Subproblem 2

x + 1 = -5.197114584 Simplifying x + 1 = -5.197114584 Reorder the terms: 1 + x = -5.197114584 Solving 1 + x = -5.197114584 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -5.197114584 + -1 Combine like terms: 1 + -1 = 0 0 + x = -5.197114584 + -1 x = -5.197114584 + -1 Combine like terms: -5.197114584 + -1 = -6.197114584 x = -6.197114584 Simplifying x = -6.197114584

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.197114584, -6.197114584}

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