x^2+2x=10.24

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Solution for x^2+2x=10.24 equation:


Simplifying
x2 + 2x = 10.24

Reorder the terms:
2x + x2 = 10.24

Solving
2x + x2 = 10.24

Solving for variable 'x'.

Reorder the terms:
-10.24 + 2x + x2 = 10.24 + -10.24

Combine like terms: 10.24 + -10.24 = 0.00
-10.24 + 2x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '10.24' to each side of the equation.
-10.24 + 2x + 10.24 + x2 = 0.00 + 10.24

Reorder the terms:
-10.24 + 10.24 + 2x + x2 = 0.00 + 10.24

Combine like terms: -10.24 + 10.24 = 0.00
0.00 + 2x + x2 = 0.00 + 10.24
2x + x2 = 0.00 + 10.24

Combine like terms: 0.00 + 10.24 = 10.24
2x + x2 = 10.24

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 = 10.24 + 1

Reorder the terms:
1 + 2x + x2 = 10.24 + 1

Combine like terms: 10.24 + 1 = 11.24
1 + 2x + x2 = 11.24

Factor a perfect square on the left side:
(x + 1)(x + 1) = 11.24

Calculate the square root of the right side: 3.352610923

Break this problem into two subproblems by setting 
(x + 1) equal to 3.352610923 and -3.352610923.

Subproblem 1

x + 1 = 3.352610923 Simplifying x + 1 = 3.352610923 Reorder the terms: 1 + x = 3.352610923 Solving 1 + x = 3.352610923 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 = 3.352610923 + -1 Combine like terms: 1 + -1 = 0 0 + x = 3.352610923 + -1 x = 3.352610923 + -1 Combine like terms: 3.352610923 + -1 = 2.352610923 x = 2.352610923 Simplifying x = 2.352610923

Subproblem 2

x + 1 = -3.352610923 Simplifying x + 1 = -3.352610923 Reorder the terms: 1 + x = -3.352610923 Solving 1 + x = -3.352610923 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 = -3.352610923 + -1 Combine like terms: 1 + -1 = 0 0 + x = -3.352610923 + -1 x = -3.352610923 + -1 Combine like terms: -3.352610923 + -1 = -4.352610923 x = -4.352610923 Simplifying x = -4.352610923

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.352610923, -4.352610923}

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