x^2+2x=29

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Solution for x^2+2x=29 equation:


Simplifying
x2 + 2x = 29

Reorder the terms:
2x + x2 = 29

Solving
2x + x2 = 29

Solving for variable 'x'.

Reorder the terms:
-29 + 2x + x2 = 29 + -29

Combine like terms: 29 + -29 = 0
-29 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '29' to each side of the equation.
-29 + 2x + 29 + x2 = 0 + 29

Reorder the terms:
-29 + 29 + 2x + x2 = 0 + 29

Combine like terms: -29 + 29 = 0
0 + 2x + x2 = 0 + 29
2x + x2 = 0 + 29

Combine like terms: 0 + 29 = 29
2x + x2 = 29

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 = 29 + 1

Reorder the terms:
1 + 2x + x2 = 29 + 1

Combine like terms: 29 + 1 = 30
1 + 2x + x2 = 30

Factor a perfect square on the left side:
(x + 1)(x + 1) = 30

Calculate the square root of the right side: 5.477225575

Break this problem into two subproblems by setting 
(x + 1) equal to 5.477225575 and -5.477225575.

Subproblem 1

x + 1 = 5.477225575 Simplifying x + 1 = 5.477225575 Reorder the terms: 1 + x = 5.477225575 Solving 1 + x = 5.477225575 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 = 5.477225575 + -1 Combine like terms: 1 + -1 = 0 0 + x = 5.477225575 + -1 x = 5.477225575 + -1 Combine like terms: 5.477225575 + -1 = 4.477225575 x = 4.477225575 Simplifying x = 4.477225575

Subproblem 2

x + 1 = -5.477225575 Simplifying x + 1 = -5.477225575 Reorder the terms: 1 + x = -5.477225575 Solving 1 + x = -5.477225575 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 = -5.477225575 + -1 Combine like terms: 1 + -1 = 0 0 + x = -5.477225575 + -1 x = -5.477225575 + -1 Combine like terms: -5.477225575 + -1 = -6.477225575 x = -6.477225575 Simplifying x = -6.477225575

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.477225575, -6.477225575}

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