2x^2-80x-273=0

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Solution for 2x^2-80x-273=0 equation:


Simplifying
2x2 + -80x + -273 = 0

Reorder the terms:
-273 + -80x + 2x2 = 0

Solving
-273 + -80x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-136.5 + -40x + x2 = 0

Move the constant term to the right:

Add '136.5' to each side of the equation.
-136.5 + -40x + 136.5 + x2 = 0 + 136.5

Reorder the terms:
-136.5 + 136.5 + -40x + x2 = 0 + 136.5

Combine like terms: -136.5 + 136.5 = 0.0
0.0 + -40x + x2 = 0 + 136.5
-40x + x2 = 0 + 136.5

Combine like terms: 0 + 136.5 = 136.5
-40x + x2 = 136.5

The x term is -40x.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40x + 400 + x2 = 136.5 + 400

Reorder the terms:
400 + -40x + x2 = 136.5 + 400

Combine like terms: 136.5 + 400 = 536.5
400 + -40x + x2 = 536.5

Factor a perfect square on the left side:
(x + -20)(x + -20) = 536.5

Calculate the square root of the right side: 23.162469644

Break this problem into two subproblems by setting 
(x + -20) equal to 23.162469644 and -23.162469644.

Subproblem 1

x + -20 = 23.162469644 Simplifying x + -20 = 23.162469644 Reorder the terms: -20 + x = 23.162469644 Solving -20 + x = 23.162469644 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = 23.162469644 + 20 Combine like terms: -20 + 20 = 0 0 + x = 23.162469644 + 20 x = 23.162469644 + 20 Combine like terms: 23.162469644 + 20 = 43.162469644 x = 43.162469644 Simplifying x = 43.162469644

Subproblem 2

x + -20 = -23.162469644 Simplifying x + -20 = -23.162469644 Reorder the terms: -20 + x = -23.162469644 Solving -20 + x = -23.162469644 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = -23.162469644 + 20 Combine like terms: -20 + 20 = 0 0 + x = -23.162469644 + 20 x = -23.162469644 + 20 Combine like terms: -23.162469644 + 20 = -3.162469644 x = -3.162469644 Simplifying x = -3.162469644

Solution

The solution to the problem is based on the solutions from the subproblems. x = {43.162469644, -3.162469644}

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