x^2-80x+250=0

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Solution for x^2-80x+250=0 equation:


Simplifying
x2 + -80x + 250 = 0

Reorder the terms:
250 + -80x + x2 = 0

Solving
250 + -80x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-250' to each side of the equation.
250 + -80x + -250 + x2 = 0 + -250

Reorder the terms:
250 + -250 + -80x + x2 = 0 + -250

Combine like terms: 250 + -250 = 0
0 + -80x + x2 = 0 + -250
-80x + x2 = 0 + -250

Combine like terms: 0 + -250 = -250
-80x + x2 = -250

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 = -250 + 1600

Reorder the terms:
1600 + -80x + x2 = -250 + 1600

Combine like terms: -250 + 1600 = 1350
1600 + -80x + x2 = 1350

Factor a perfect square on the left side:
(x + -40)(x + -40) = 1350

Calculate the square root of the right side: 36.742346142

Break this problem into two subproblems by setting 
(x + -40) equal to 36.742346142 and -36.742346142.

Subproblem 1

x + -40 = 36.742346142 Simplifying x + -40 = 36.742346142 Reorder the terms: -40 + x = 36.742346142 Solving -40 + x = 36.742346142 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 = 36.742346142 + 40 Combine like terms: -40 + 40 = 0 0 + x = 36.742346142 + 40 x = 36.742346142 + 40 Combine like terms: 36.742346142 + 40 = 76.742346142 x = 76.742346142 Simplifying x = 76.742346142

Subproblem 2

x + -40 = -36.742346142 Simplifying x + -40 = -36.742346142 Reorder the terms: -40 + x = -36.742346142 Solving -40 + x = -36.742346142 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 = -36.742346142 + 40 Combine like terms: -40 + 40 = 0 0 + x = -36.742346142 + 40 x = -36.742346142 + 40 Combine like terms: -36.742346142 + 40 = 3.257653858 x = 3.257653858 Simplifying x = 3.257653858

Solution

The solution to the problem is based on the solutions from the subproblems. x = {76.742346142, 3.257653858}

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