x^2-80x=-200

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Solution for x^2-80x=-200 equation:


Simplifying
x2 + -80x = -200

Reorder the terms:
-80x + x2 = -200

Solving
-80x + x2 = -200

Solving for variable 'x'.

Reorder the terms:
200 + -80x + x2 = -200 + 200

Combine like terms: -200 + 200 = 0
200 + -80x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-200' to each side of the equation.
200 + -80x + -200 + x2 = 0 + -200

Reorder the terms:
200 + -200 + -80x + x2 = 0 + -200

Combine like terms: 200 + -200 = 0
0 + -80x + x2 = 0 + -200
-80x + x2 = 0 + -200

Combine like terms: 0 + -200 = -200
-80x + x2 = -200

The x term is -80x.  Take half its coefficient (-40).
Square it (1600) and add it to both sides.

Add '1600' to each side of the equation.
-80x + 1600 + x2 = -200 + 1600

Reorder the terms:
1600 + -80x + x2 = -200 + 1600

Combine like terms: -200 + 1600 = 1400
1600 + -80x + x2 = 1400

Factor a perfect square on the left side:
(x + -40)(x + -40) = 1400

Calculate the square root of the right side: 37.416573868

Break this problem into two subproblems by setting 
(x + -40) equal to 37.416573868 and -37.416573868.

Subproblem 1

x + -40 = 37.416573868 Simplifying x + -40 = 37.416573868 Reorder the terms: -40 + x = 37.416573868 Solving -40 + x = 37.416573868 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '40' to each side of the equation. -40 + 40 + x = 37.416573868 + 40 Combine like terms: -40 + 40 = 0 0 + x = 37.416573868 + 40 x = 37.416573868 + 40 Combine like terms: 37.416573868 + 40 = 77.416573868 x = 77.416573868 Simplifying x = 77.416573868

Subproblem 2

x + -40 = -37.416573868 Simplifying x + -40 = -37.416573868 Reorder the terms: -40 + x = -37.416573868 Solving -40 + x = -37.416573868 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '40' to each side of the equation. -40 + 40 + x = -37.416573868 + 40 Combine like terms: -40 + 40 = 0 0 + x = -37.416573868 + 40 x = -37.416573868 + 40 Combine like terms: -37.416573868 + 40 = 2.583426132 x = 2.583426132 Simplifying x = 2.583426132

Solution

The solution to the problem is based on the solutions from the subproblems. x = {77.416573868, 2.583426132}

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