x^2-4x-360=0

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Solution for x^2-4x-360=0 equation:


Simplifying
x2 + -4x + -360 = 0

Reorder the terms:
-360 + -4x + x2 = 0

Solving
-360 + -4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '360' to each side of the equation.
-360 + -4x + 360 + x2 = 0 + 360

Reorder the terms:
-360 + 360 + -4x + x2 = 0 + 360

Combine like terms: -360 + 360 = 0
0 + -4x + x2 = 0 + 360
-4x + x2 = 0 + 360

Combine like terms: 0 + 360 = 360
-4x + x2 = 360

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 = 360 + 4

Reorder the terms:
4 + -4x + x2 = 360 + 4

Combine like terms: 360 + 4 = 364
4 + -4x + x2 = 364

Factor a perfect square on the left side:
(x + -2)(x + -2) = 364

Calculate the square root of the right side: 19.078784028

Break this problem into two subproblems by setting 
(x + -2) equal to 19.078784028 and -19.078784028.

Subproblem 1

x + -2 = 19.078784028 Simplifying x + -2 = 19.078784028 Reorder the terms: -2 + x = 19.078784028 Solving -2 + x = 19.078784028 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 = 19.078784028 + 2 Combine like terms: -2 + 2 = 0 0 + x = 19.078784028 + 2 x = 19.078784028 + 2 Combine like terms: 19.078784028 + 2 = 21.078784028 x = 21.078784028 Simplifying x = 21.078784028

Subproblem 2

x + -2 = -19.078784028 Simplifying x + -2 = -19.078784028 Reorder the terms: -2 + x = -19.078784028 Solving -2 + x = -19.078784028 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 = -19.078784028 + 2 Combine like terms: -2 + 2 = 0 0 + x = -19.078784028 + 2 x = -19.078784028 + 2 Combine like terms: -19.078784028 + 2 = -17.078784028 x = -17.078784028 Simplifying x = -17.078784028

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.078784028, -17.078784028}

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