x^2+14x=-10

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Solution for x^2+14x=-10 equation:


Simplifying
x2 + 14x = -10

Reorder the terms:
14x + x2 = -10

Solving
14x + x2 = -10

Solving for variable 'x'.

Reorder the terms:
10 + 14x + x2 = -10 + 10

Combine like terms: -10 + 10 = 0
10 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + 14x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + 14x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + 14x + x2 = 0 + -10
14x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
14x + x2 = -10

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = -10 + 49

Reorder the terms:
49 + 14x + x2 = -10 + 49

Combine like terms: -10 + 49 = 39
49 + 14x + x2 = 39

Factor a perfect square on the left side:
(x + 7)(x + 7) = 39

Calculate the square root of the right side: 6.244997998

Break this problem into two subproblems by setting 
(x + 7) equal to 6.244997998 and -6.244997998.

Subproblem 1

x + 7 = 6.244997998 Simplifying x + 7 = 6.244997998 Reorder the terms: 7 + x = 6.244997998 Solving 7 + x = 6.244997998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 6.244997998 + -7 Combine like terms: 7 + -7 = 0 0 + x = 6.244997998 + -7 x = 6.244997998 + -7 Combine like terms: 6.244997998 + -7 = -0.755002002 x = -0.755002002 Simplifying x = -0.755002002

Subproblem 2

x + 7 = -6.244997998 Simplifying x + 7 = -6.244997998 Reorder the terms: 7 + x = -6.244997998 Solving 7 + x = -6.244997998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -6.244997998 + -7 Combine like terms: 7 + -7 = 0 0 + x = -6.244997998 + -7 x = -6.244997998 + -7 Combine like terms: -6.244997998 + -7 = -13.244997998 x = -13.244997998 Simplifying x = -13.244997998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.755002002, -13.244997998}

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