0=x^2+4x-144

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Solution for 0=x^2+4x-144 equation:


Simplifying
0 = x2 + 4x + -144

Reorder the terms:
0 = -144 + 4x + x2

Solving
0 = -144 + 4x + x2

Solving for variable 'x'.

Combine like terms: 0 + 144 = 144
144 + -4x + -1x2 = -144 + 4x + x2 + 144 + -4x + -1x2

Reorder the terms:
144 + -4x + -1x2 = -144 + 144 + 4x + -4x + x2 + -1x2

Combine like terms: -144 + 144 = 0
144 + -4x + -1x2 = 0 + 4x + -4x + x2 + -1x2
144 + -4x + -1x2 = 4x + -4x + x2 + -1x2

Combine like terms: 4x + -4x = 0
144 + -4x + -1x2 = 0 + x2 + -1x2
144 + -4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
144 + -4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-144 + 4x + x2 = 0

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + 4x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + 4x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 4x + x2 = 0 + 144
4x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
4x + x2 = 144

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 = 144 + 4

Reorder the terms:
4 + 4x + x2 = 144 + 4

Combine like terms: 144 + 4 = 148
4 + 4x + x2 = 148

Factor a perfect square on the left side:
(x + 2)(x + 2) = 148

Calculate the square root of the right side: 12.165525061

Break this problem into two subproblems by setting 
(x + 2) equal to 12.165525061 and -12.165525061.

Subproblem 1

x + 2 = 12.165525061 Simplifying x + 2 = 12.165525061 Reorder the terms: 2 + x = 12.165525061 Solving 2 + x = 12.165525061 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 = 12.165525061 + -2 Combine like terms: 2 + -2 = 0 0 + x = 12.165525061 + -2 x = 12.165525061 + -2 Combine like terms: 12.165525061 + -2 = 10.165525061 x = 10.165525061 Simplifying x = 10.165525061

Subproblem 2

x + 2 = -12.165525061 Simplifying x + 2 = -12.165525061 Reorder the terms: 2 + x = -12.165525061 Solving 2 + x = -12.165525061 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 = -12.165525061 + -2 Combine like terms: 2 + -2 = 0 0 + x = -12.165525061 + -2 x = -12.165525061 + -2 Combine like terms: -12.165525061 + -2 = -14.165525061 x = -14.165525061 Simplifying x = -14.165525061

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.165525061, -14.165525061}

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