x^2+14x-111=0

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Solution for x^2+14x-111=0 equation:


Simplifying
x2 + 14x + -111 = 0

Reorder the terms:
-111 + 14x + x2 = 0

Solving
-111 + 14x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '111' to each side of the equation.
-111 + 14x + 111 + x2 = 0 + 111

Reorder the terms:
-111 + 111 + 14x + x2 = 0 + 111

Combine like terms: -111 + 111 = 0
0 + 14x + x2 = 0 + 111
14x + x2 = 0 + 111

Combine like terms: 0 + 111 = 111
14x + x2 = 111

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 = 111 + 49

Reorder the terms:
49 + 14x + x2 = 111 + 49

Combine like terms: 111 + 49 = 160
49 + 14x + x2 = 160

Factor a perfect square on the left side:
(x + 7)(x + 7) = 160

Calculate the square root of the right side: 12.649110641

Break this problem into two subproblems by setting 
(x + 7) equal to 12.649110641 and -12.649110641.

Subproblem 1

x + 7 = 12.649110641 Simplifying x + 7 = 12.649110641 Reorder the terms: 7 + x = 12.649110641 Solving 7 + x = 12.649110641 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 = 12.649110641 + -7 Combine like terms: 7 + -7 = 0 0 + x = 12.649110641 + -7 x = 12.649110641 + -7 Combine like terms: 12.649110641 + -7 = 5.649110641 x = 5.649110641 Simplifying x = 5.649110641

Subproblem 2

x + 7 = -12.649110641 Simplifying x + 7 = -12.649110641 Reorder the terms: 7 + x = -12.649110641 Solving 7 + x = -12.649110641 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 = -12.649110641 + -7 Combine like terms: 7 + -7 = 0 0 + x = -12.649110641 + -7 x = -12.649110641 + -7 Combine like terms: -12.649110641 + -7 = -19.649110641 x = -19.649110641 Simplifying x = -19.649110641

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.649110641, -19.649110641}

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