2x^2-20x=-23

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Solution for 2x^2-20x=-23 equation:


Simplifying
2x2 + -20x = -23

Reorder the terms:
-20x + 2x2 = -23

Solving
-20x + 2x2 = -23

Solving for variable 'x'.

Reorder the terms:
23 + -20x + 2x2 = -23 + 23

Combine like terms: -23 + 23 = 0
23 + -20x + 2x2 = 0

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

Divide each side by '2'.
11.5 + -10x + x2 = 0

Move the constant term to the right:

Add '-11.5' to each side of the equation.
11.5 + -10x + -11.5 + x2 = 0 + -11.5

Reorder the terms:
11.5 + -11.5 + -10x + x2 = 0 + -11.5

Combine like terms: 11.5 + -11.5 = 0.0
0.0 + -10x + x2 = 0 + -11.5
-10x + x2 = 0 + -11.5

Combine like terms: 0 + -11.5 = -11.5
-10x + x2 = -11.5

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -11.5 + 25

Reorder the terms:
25 + -10x + x2 = -11.5 + 25

Combine like terms: -11.5 + 25 = 13.5
25 + -10x + x2 = 13.5

Factor a perfect square on the left side:
(x + -5)(x + -5) = 13.5

Calculate the square root of the right side: 3.674234614

Break this problem into two subproblems by setting 
(x + -5) equal to 3.674234614 and -3.674234614.

Subproblem 1

x + -5 = 3.674234614 Simplifying x + -5 = 3.674234614 Reorder the terms: -5 + x = 3.674234614 Solving -5 + x = 3.674234614 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 3.674234614 + 5 Combine like terms: -5 + 5 = 0 0 + x = 3.674234614 + 5 x = 3.674234614 + 5 Combine like terms: 3.674234614 + 5 = 8.674234614 x = 8.674234614 Simplifying x = 8.674234614

Subproblem 2

x + -5 = -3.674234614 Simplifying x + -5 = -3.674234614 Reorder the terms: -5 + x = -3.674234614 Solving -5 + x = -3.674234614 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -3.674234614 + 5 Combine like terms: -5 + 5 = 0 0 + x = -3.674234614 + 5 x = -3.674234614 + 5 Combine like terms: -3.674234614 + 5 = 1.325765386 x = 1.325765386 Simplifying x = 1.325765386

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.674234614, 1.325765386}

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