x^2+2x-58=0

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Solution for x^2+2x-58=0 equation:


Simplifying
x2 + 2x + -58 = 0

Reorder the terms:
-58 + 2x + x2 = 0

Solving
-58 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '58' to each side of the equation.
-58 + 2x + 58 + x2 = 0 + 58

Reorder the terms:
-58 + 58 + 2x + x2 = 0 + 58

Combine like terms: -58 + 58 = 0
0 + 2x + x2 = 0 + 58
2x + x2 = 0 + 58

Combine like terms: 0 + 58 = 58
2x + x2 = 58

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 = 58 + 1

Reorder the terms:
1 + 2x + x2 = 58 + 1

Combine like terms: 58 + 1 = 59
1 + 2x + x2 = 59

Factor a perfect square on the left side:
(x + 1)(x + 1) = 59

Calculate the square root of the right side: 7.681145748

Break this problem into two subproblems by setting 
(x + 1) equal to 7.681145748 and -7.681145748.

Subproblem 1

x + 1 = 7.681145748 Simplifying x + 1 = 7.681145748 Reorder the terms: 1 + x = 7.681145748 Solving 1 + x = 7.681145748 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 = 7.681145748 + -1 Combine like terms: 1 + -1 = 0 0 + x = 7.681145748 + -1 x = 7.681145748 + -1 Combine like terms: 7.681145748 + -1 = 6.681145748 x = 6.681145748 Simplifying x = 6.681145748

Subproblem 2

x + 1 = -7.681145748 Simplifying x + 1 = -7.681145748 Reorder the terms: 1 + x = -7.681145748 Solving 1 + x = -7.681145748 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 = -7.681145748 + -1 Combine like terms: 1 + -1 = 0 0 + x = -7.681145748 + -1 x = -7.681145748 + -1 Combine like terms: -7.681145748 + -1 = -8.681145748 x = -8.681145748 Simplifying x = -8.681145748

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.681145748, -8.681145748}

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