x^2+4x-187=0

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Solution for x^2+4x-187=0 equation:


Simplifying
x2 + 4x + -187 = 0

Reorder the terms:
-187 + 4x + x2 = 0

Solving
-187 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '187' to each side of the equation.
-187 + 4x + 187 + x2 = 0 + 187

Reorder the terms:
-187 + 187 + 4x + x2 = 0 + 187

Combine like terms: -187 + 187 = 0
0 + 4x + x2 = 0 + 187
4x + x2 = 0 + 187

Combine like terms: 0 + 187 = 187
4x + x2 = 187

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 187 + 4

Reorder the terms:
4 + 4x + x2 = 187 + 4

Combine like terms: 187 + 4 = 191
4 + 4x + x2 = 191

Factor a perfect square on the left side:
(x + 2)(x + 2) = 191

Calculate the square root of the right side: 13.820274961

Break this problem into two subproblems by setting 
(x + 2) equal to 13.820274961 and -13.820274961.

Subproblem 1

x + 2 = 13.820274961 Simplifying x + 2 = 13.820274961 Reorder the terms: 2 + x = 13.820274961 Solving 2 + x = 13.820274961 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 13.820274961 + -2 Combine like terms: 2 + -2 = 0 0 + x = 13.820274961 + -2 x = 13.820274961 + -2 Combine like terms: 13.820274961 + -2 = 11.820274961 x = 11.820274961 Simplifying x = 11.820274961

Subproblem 2

x + 2 = -13.820274961 Simplifying x + 2 = -13.820274961 Reorder the terms: 2 + x = -13.820274961 Solving 2 + x = -13.820274961 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -13.820274961 + -2 Combine like terms: 2 + -2 = 0 0 + x = -13.820274961 + -2 x = -13.820274961 + -2 Combine like terms: -13.820274961 + -2 = -15.820274961 x = -15.820274961 Simplifying x = -15.820274961

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.820274961, -15.820274961}

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