x^2+2x=57.3

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Solution for x^2+2x=57.3 equation:


Simplifying
x2 + 2x = 57.3

Reorder the terms:
2x + x2 = 57.3

Solving
2x + x2 = 57.3

Solving for variable 'x'.

Reorder the terms:
-57.3 + 2x + x2 = 57.3 + -57.3

Combine like terms: 57.3 + -57.3 = 0.0
-57.3 + 2x + x2 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '57.3' to each side of the equation.
-57.3 + 2x + 57.3 + x2 = 0.0 + 57.3

Reorder the terms:
-57.3 + 57.3 + 2x + x2 = 0.0 + 57.3

Combine like terms: -57.3 + 57.3 = 0.0
0.0 + 2x + x2 = 0.0 + 57.3
2x + x2 = 0.0 + 57.3

Combine like terms: 0.0 + 57.3 = 57.3
2x + x2 = 57.3

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 = 57.3 + 1

Reorder the terms:
1 + 2x + x2 = 57.3 + 1

Combine like terms: 57.3 + 1 = 58.3
1 + 2x + x2 = 58.3

Factor a perfect square on the left side:
(x + 1)(x + 1) = 58.3

Calculate the square root of the right side: 7.635443668

Break this problem into two subproblems by setting 
(x + 1) equal to 7.635443668 and -7.635443668.

Subproblem 1

x + 1 = 7.635443668 Simplifying x + 1 = 7.635443668 Reorder the terms: 1 + x = 7.635443668 Solving 1 + x = 7.635443668 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 = 7.635443668 + -1 Combine like terms: 1 + -1 = 0 0 + x = 7.635443668 + -1 x = 7.635443668 + -1 Combine like terms: 7.635443668 + -1 = 6.635443668 x = 6.635443668 Simplifying x = 6.635443668

Subproblem 2

x + 1 = -7.635443668 Simplifying x + 1 = -7.635443668 Reorder the terms: 1 + x = -7.635443668 Solving 1 + x = -7.635443668 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 = -7.635443668 + -1 Combine like terms: 1 + -1 = 0 0 + x = -7.635443668 + -1 x = -7.635443668 + -1 Combine like terms: -7.635443668 + -1 = -8.635443668 x = -8.635443668 Simplifying x = -8.635443668

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.635443668, -8.635443668}

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