23x+9-2x^2=0

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Solution for 23x+9-2x^2=0 equation:


Simplifying
23x + 9 + -2x2 = 0

Reorder the terms:
9 + 23x + -2x2 = 0

Solving
9 + 23x + -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'.
-4.5 + -11.5x + x2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + -11.5x + 4.5 + x2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + -11.5x + x2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + -11.5x + x2 = 0 + 4.5
-11.5x + x2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
-11.5x + x2 = 4.5

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 = 4.5 + 33.0625

Reorder the terms:
33.0625 + -11.5x + x2 = 4.5 + 33.0625

Combine like terms: 4.5 + 33.0625 = 37.5625
33.0625 + -11.5x + x2 = 37.5625

Factor a perfect square on the left side:
(x + -5.75)(x + -5.75) = 37.5625

Calculate the square root of the right side: 6.128825336

Break this problem into two subproblems by setting 
(x + -5.75) equal to 6.128825336 and -6.128825336.

Subproblem 1

x + -5.75 = 6.128825336 Simplifying x + -5.75 = 6.128825336 Reorder the terms: -5.75 + x = 6.128825336 Solving -5.75 + x = 6.128825336 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 = 6.128825336 + 5.75 Combine like terms: -5.75 + 5.75 = 0.00 0.00 + x = 6.128825336 + 5.75 x = 6.128825336 + 5.75 Combine like terms: 6.128825336 + 5.75 = 11.878825336 x = 11.878825336 Simplifying x = 11.878825336

Subproblem 2

x + -5.75 = -6.128825336 Simplifying x + -5.75 = -6.128825336 Reorder the terms: -5.75 + x = -6.128825336 Solving -5.75 + x = -6.128825336 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 = -6.128825336 + 5.75 Combine like terms: -5.75 + 5.75 = 0.00 0.00 + x = -6.128825336 + 5.75 x = -6.128825336 + 5.75 Combine like terms: -6.128825336 + 5.75 = -0.378825336 x = -0.378825336 Simplifying x = -0.378825336

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.878825336, -0.378825336}

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