x^2+14x=-25

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Solution for x^2+14x=-25 equation:


Simplifying
x2 + 14x = -25

Reorder the terms:
14x + x2 = -25

Solving
14x + x2 = -25

Solving for variable 'x'.

Reorder the terms:
25 + 14x + x2 = -25 + 25

Combine like terms: -25 + 25 = 0
25 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + 14x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + 14x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 14x + x2 = 0 + -25
14x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
14x + x2 = -25

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 = -25 + 49

Reorder the terms:
49 + 14x + x2 = -25 + 49

Combine like terms: -25 + 49 = 24
49 + 14x + x2 = 24

Factor a perfect square on the left side:
(x + 7)(x + 7) = 24

Calculate the square root of the right side: 4.898979486

Break this problem into two subproblems by setting 
(x + 7) equal to 4.898979486 and -4.898979486.

Subproblem 1

x + 7 = 4.898979486 Simplifying x + 7 = 4.898979486 Reorder the terms: 7 + x = 4.898979486 Solving 7 + x = 4.898979486 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 = 4.898979486 + -7 Combine like terms: 7 + -7 = 0 0 + x = 4.898979486 + -7 x = 4.898979486 + -7 Combine like terms: 4.898979486 + -7 = -2.101020514 x = -2.101020514 Simplifying x = -2.101020514

Subproblem 2

x + 7 = -4.898979486 Simplifying x + 7 = -4.898979486 Reorder the terms: 7 + x = -4.898979486 Solving 7 + x = -4.898979486 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 = -4.898979486 + -7 Combine like terms: 7 + -7 = 0 0 + x = -4.898979486 + -7 x = -4.898979486 + -7 Combine like terms: -4.898979486 + -7 = -11.898979486 x = -11.898979486 Simplifying x = -11.898979486

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.101020514, -11.898979486}

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