5x(2x-89)=164

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Solution for 5x(2x-89)=164 equation:


Simplifying
5x(2x + -89) = 164

Reorder the terms:
5x(-89 + 2x) = 164
(-89 * 5x + 2x * 5x) = 164
(-445x + 10x2) = 164

Solving
-445x + 10x2 = 164

Solving for variable 'x'.

Reorder the terms:
-164 + -445x + 10x2 = 164 + -164

Combine like terms: 164 + -164 = 0
-164 + -445x + 10x2 = 0

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

Divide each side by '10'.
-16.4 + -44.5x + x2 = 0.0

Move the constant term to the right:

Add '16.4' to each side of the equation.
-16.4 + -44.5x + 16.4 + x2 = 0.0 + 16.4

Reorder the terms:
-16.4 + 16.4 + -44.5x + x2 = 0.0 + 16.4

Combine like terms: -16.4 + 16.4 = 0.0
0.0 + -44.5x + x2 = 0.0 + 16.4
-44.5x + x2 = 0.0 + 16.4

Combine like terms: 0.0 + 16.4 = 16.4
-44.5x + x2 = 16.4

The x term is -44.5x.  Take half its coefficient (-22.25).
Square it (495.0625) and add it to both sides.

Add '495.0625' to each side of the equation.
-44.5x + 495.0625 + x2 = 16.4 + 495.0625

Reorder the terms:
495.0625 + -44.5x + x2 = 16.4 + 495.0625

Combine like terms: 16.4 + 495.0625 = 511.4625
495.0625 + -44.5x + x2 = 511.4625

Factor a perfect square on the left side:
(x + -22.25)(x + -22.25) = 511.4625

Calculate the square root of the right side: 22.615536695

Break this problem into two subproblems by setting 
(x + -22.25) equal to 22.615536695 and -22.615536695.

Subproblem 1

x + -22.25 = 22.615536695 Simplifying x + -22.25 = 22.615536695 Reorder the terms: -22.25 + x = 22.615536695 Solving -22.25 + x = 22.615536695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '22.25' to each side of the equation. -22.25 + 22.25 + x = 22.615536695 + 22.25 Combine like terms: -22.25 + 22.25 = 0.00 0.00 + x = 22.615536695 + 22.25 x = 22.615536695 + 22.25 Combine like terms: 22.615536695 + 22.25 = 44.865536695 x = 44.865536695 Simplifying x = 44.865536695

Subproblem 2

x + -22.25 = -22.615536695 Simplifying x + -22.25 = -22.615536695 Reorder the terms: -22.25 + x = -22.615536695 Solving -22.25 + x = -22.615536695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '22.25' to each side of the equation. -22.25 + 22.25 + x = -22.615536695 + 22.25 Combine like terms: -22.25 + 22.25 = 0.00 0.00 + x = -22.615536695 + 22.25 x = -22.615536695 + 22.25 Combine like terms: -22.615536695 + 22.25 = -0.365536695 x = -0.365536695 Simplifying x = -0.365536695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {44.865536695, -0.365536695}

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