x^2-4x-144=0

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


Simplifying
x2 + -4x + -144 = 0

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

Solving
-144 + -4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

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 = 14.165525061 x = 14.165525061 Simplifying x = 14.165525061

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 = -10.165525061 x = -10.165525061 Simplifying x = -10.165525061

Solution

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

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