x^2+10x=13

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Solution for x^2+10x=13 equation:


Simplifying
x2 + 10x = 13

Reorder the terms:
10x + x2 = 13

Solving
10x + x2 = 13

Solving for variable 'x'.

Reorder the terms:
-13 + 10x + x2 = 13 + -13

Combine like terms: 13 + -13 = 0
-13 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + 10x + 13 + x2 = 0 + 13

Reorder the terms:
-13 + 13 + 10x + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + 10x + x2 = 0 + 13
10x + x2 = 0 + 13

Combine like terms: 0 + 13 = 13
10x + x2 = 13

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 13 + 25

Reorder the terms:
25 + 10x + x2 = 13 + 25

Combine like terms: 13 + 25 = 38
25 + 10x + x2 = 38

Factor a perfect square on the left side:
(x + 5)(x + 5) = 38

Calculate the square root of the right side: 6.164414003

Break this problem into two subproblems by setting 
(x + 5) equal to 6.164414003 and -6.164414003.

Subproblem 1

x + 5 = 6.164414003 Simplifying x + 5 = 6.164414003 Reorder the terms: 5 + x = 6.164414003 Solving 5 + x = 6.164414003 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 6.164414003 + -5 Combine like terms: 5 + -5 = 0 0 + x = 6.164414003 + -5 x = 6.164414003 + -5 Combine like terms: 6.164414003 + -5 = 1.164414003 x = 1.164414003 Simplifying x = 1.164414003

Subproblem 2

x + 5 = -6.164414003 Simplifying x + 5 = -6.164414003 Reorder the terms: 5 + x = -6.164414003 Solving 5 + x = -6.164414003 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -6.164414003 + -5 Combine like terms: 5 + -5 = 0 0 + x = -6.164414003 + -5 x = -6.164414003 + -5 Combine like terms: -6.164414003 + -5 = -11.164414003 x = -11.164414003 Simplifying x = -11.164414003

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.164414003, -11.164414003}

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