x^2-160*x-800=0

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Solution for x^2-160*x-800=0 equation:


Simplifying
x2 + -160x + -800 = 0

Reorder the terms:
-800 + -160x + x2 = 0

Solving
-800 + -160x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '800' to each side of the equation.
-800 + -160x + 800 + x2 = 0 + 800

Reorder the terms:
-800 + 800 + -160x + x2 = 0 + 800

Combine like terms: -800 + 800 = 0
0 + -160x + x2 = 0 + 800
-160x + x2 = 0 + 800

Combine like terms: 0 + 800 = 800
-160x + x2 = 800

The x term is -160x.  Take half its coefficient (-80).
Square it (6400) and add it to both sides.

Add '6400' to each side of the equation.
-160x + 6400 + x2 = 800 + 6400

Reorder the terms:
6400 + -160x + x2 = 800 + 6400

Combine like terms: 800 + 6400 = 7200
6400 + -160x + x2 = 7200

Factor a perfect square on the left side:
(x + -80)(x + -80) = 7200

Calculate the square root of the right side: 84.852813742

Break this problem into two subproblems by setting 
(x + -80) equal to 84.852813742 and -84.852813742.

Subproblem 1

x + -80 = 84.852813742 Simplifying x + -80 = 84.852813742 Reorder the terms: -80 + x = 84.852813742 Solving -80 + x = 84.852813742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '80' to each side of the equation. -80 + 80 + x = 84.852813742 + 80 Combine like terms: -80 + 80 = 0 0 + x = 84.852813742 + 80 x = 84.852813742 + 80 Combine like terms: 84.852813742 + 80 = 164.852813742 x = 164.852813742 Simplifying x = 164.852813742

Subproblem 2

x + -80 = -84.852813742 Simplifying x + -80 = -84.852813742 Reorder the terms: -80 + x = -84.852813742 Solving -80 + x = -84.852813742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '80' to each side of the equation. -80 + 80 + x = -84.852813742 + 80 Combine like terms: -80 + 80 = 0 0 + x = -84.852813742 + 80 x = -84.852813742 + 80 Combine like terms: -84.852813742 + 80 = -4.852813742 x = -4.852813742 Simplifying x = -4.852813742

Solution

The solution to the problem is based on the solutions from the subproblems. x = {164.852813742, -4.852813742}

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