2x^2-23x=20

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


Simplifying
2x2 + -23x = 20

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

Solving
-23x + 2x2 = 20

Solving for variable 'x'.

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

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

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

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

Move the constant term to the right:

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

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

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

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

The x term is -11.5x.  Take half its coefficient (-5.75).
Square it (33.0625) and add it to both sides.

Add '33.0625' to each side of the equation.
-11.5x + 33.0625 + x2 = 10 + 33.0625

Reorder the terms:
33.0625 + -11.5x + x2 = 10 + 33.0625

Combine like terms: 10 + 33.0625 = 43.0625
33.0625 + -11.5x + x2 = 43.0625

Factor a perfect square on the left side:
(x + -5.75)(x + -5.75) = 43.0625

Calculate the square root of the right side: 6.562202374

Break this problem into two subproblems by setting 
(x + -5.75) equal to 6.562202374 and -6.562202374.

Subproblem 1

x + -5.75 = 6.562202374 Simplifying x + -5.75 = 6.562202374 Reorder the terms: -5.75 + x = 6.562202374 Solving -5.75 + x = 6.562202374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.75' to each side of the equation. -5.75 + 5.75 + x = 6.562202374 + 5.75 Combine like terms: -5.75 + 5.75 = 0.00 0.00 + x = 6.562202374 + 5.75 x = 6.562202374 + 5.75 Combine like terms: 6.562202374 + 5.75 = 12.312202374 x = 12.312202374 Simplifying x = 12.312202374

Subproblem 2

x + -5.75 = -6.562202374 Simplifying x + -5.75 = -6.562202374 Reorder the terms: -5.75 + x = -6.562202374 Solving -5.75 + x = -6.562202374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.75' to each side of the equation. -5.75 + 5.75 + x = -6.562202374 + 5.75 Combine like terms: -5.75 + 5.75 = 0.00 0.00 + x = -6.562202374 + 5.75 x = -6.562202374 + 5.75 Combine like terms: -6.562202374 + 5.75 = -0.812202374 x = -0.812202374 Simplifying x = -0.812202374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.312202374, -0.812202374}

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