8x(x-3)=23

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Solution for 8x(x-3)=23 equation:


Simplifying
8x(x + -3) = 23

Reorder the terms:
8x(-3 + x) = 23
(-3 * 8x + x * 8x) = 23
(-24x + 8x2) = 23

Solving
-24x + 8x2 = 23

Solving for variable 'x'.

Reorder the terms:
-23 + -24x + 8x2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + -24x + 8x2 = 0

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

Divide each side by '8'.
-2.875 + -3x + x2 = 0

Move the constant term to the right:

Add '2.875' to each side of the equation.
-2.875 + -3x + 2.875 + x2 = 0 + 2.875

Reorder the terms:
-2.875 + 2.875 + -3x + x2 = 0 + 2.875

Combine like terms: -2.875 + 2.875 = 0.000
0.000 + -3x + x2 = 0 + 2.875
-3x + x2 = 0 + 2.875

Combine like terms: 0 + 2.875 = 2.875
-3x + x2 = 2.875

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 2.875 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 2.875 + 2.25

Combine like terms: 2.875 + 2.25 = 5.125
2.25 + -3x + x2 = 5.125

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 5.125

Calculate the square root of the right side: 2.263846285

Break this problem into two subproblems by setting 
(x + -1.5) equal to 2.263846285 and -2.263846285.

Subproblem 1

x + -1.5 = 2.263846285 Simplifying x + -1.5 = 2.263846285 Reorder the terms: -1.5 + x = 2.263846285 Solving -1.5 + x = 2.263846285 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 2.263846285 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 2.263846285 + 1.5 x = 2.263846285 + 1.5 Combine like terms: 2.263846285 + 1.5 = 3.763846285 x = 3.763846285 Simplifying x = 3.763846285

Subproblem 2

x + -1.5 = -2.263846285 Simplifying x + -1.5 = -2.263846285 Reorder the terms: -1.5 + x = -2.263846285 Solving -1.5 + x = -2.263846285 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -2.263846285 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -2.263846285 + 1.5 x = -2.263846285 + 1.5 Combine like terms: -2.263846285 + 1.5 = -0.763846285 x = -0.763846285 Simplifying x = -0.763846285

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.763846285, -0.763846285}

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