10x+x^2=-12

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Solution for 10x+x^2=-12 equation:


Simplifying
10x + x2 = -12

Solving
10x + x2 = -12

Solving for variable 'x'.

Reorder the terms:
12 + 10x + x2 = -12 + 12

Combine like terms: -12 + 12 = 0
12 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + 10x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + 10x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 10x + x2 = 0 + -12
10x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
10x + x2 = -12

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 = -12 + 25

Reorder the terms:
25 + 10x + x2 = -12 + 25

Combine like terms: -12 + 25 = 13
25 + 10x + x2 = 13

Factor a perfect square on the left side:
(x + 5)(x + 5) = 13

Calculate the square root of the right side: 3.605551275

Break this problem into two subproblems by setting 
(x + 5) equal to 3.605551275 and -3.605551275.

Subproblem 1

x + 5 = 3.605551275 Simplifying x + 5 = 3.605551275 Reorder the terms: 5 + x = 3.605551275 Solving 5 + x = 3.605551275 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 = 3.605551275 + -5 Combine like terms: 5 + -5 = 0 0 + x = 3.605551275 + -5 x = 3.605551275 + -5 Combine like terms: 3.605551275 + -5 = -1.394448725 x = -1.394448725 Simplifying x = -1.394448725

Subproblem 2

x + 5 = -3.605551275 Simplifying x + 5 = -3.605551275 Reorder the terms: 5 + x = -3.605551275 Solving 5 + x = -3.605551275 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 = -3.605551275 + -5 Combine like terms: 5 + -5 = 0 0 + x = -3.605551275 + -5 x = -3.605551275 + -5 Combine like terms: -3.605551275 + -5 = -8.605551275 x = -8.605551275 Simplifying x = -8.605551275

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.394448725, -8.605551275}

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