(2x-5)*x=186

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Solution for (2x-5)*x=186 equation:


Simplifying
(2x + -5) * x = 186

Reorder the terms:
(-5 + 2x) * x = 186

Reorder the terms for easier multiplication:
x(-5 + 2x) = 186
(-5 * x + 2x * x) = 186
(-5x + 2x2) = 186

Solving
-5x + 2x2 = 186

Solving for variable 'x'.

Reorder the terms:
-186 + -5x + 2x2 = 186 + -186

Combine like terms: 186 + -186 = 0
-186 + -5x + 2x2 = 0

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

Divide each side by '2'.
-93 + -2.5x + x2 = 0

Move the constant term to the right:

Add '93' to each side of the equation.
-93 + -2.5x + 93 + x2 = 0 + 93

Reorder the terms:
-93 + 93 + -2.5x + x2 = 0 + 93

Combine like terms: -93 + 93 = 0
0 + -2.5x + x2 = 0 + 93
-2.5x + x2 = 0 + 93

Combine like terms: 0 + 93 = 93
-2.5x + x2 = 93

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 93 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 93 + 1.5625

Combine like terms: 93 + 1.5625 = 94.5625
1.5625 + -2.5x + x2 = 94.5625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 94.5625

Calculate the square root of the right side: 9.724325169

Break this problem into two subproblems by setting 
(x + -1.25) equal to 9.724325169 and -9.724325169.

Subproblem 1

x + -1.25 = 9.724325169 Simplifying x + -1.25 = 9.724325169 Reorder the terms: -1.25 + x = 9.724325169 Solving -1.25 + x = 9.724325169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 9.724325169 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 9.724325169 + 1.25 x = 9.724325169 + 1.25 Combine like terms: 9.724325169 + 1.25 = 10.974325169 x = 10.974325169 Simplifying x = 10.974325169

Subproblem 2

x + -1.25 = -9.724325169 Simplifying x + -1.25 = -9.724325169 Reorder the terms: -1.25 + x = -9.724325169 Solving -1.25 + x = -9.724325169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -9.724325169 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -9.724325169 + 1.25 x = -9.724325169 + 1.25 Combine like terms: -9.724325169 + 1.25 = -8.474325169 x = -8.474325169 Simplifying x = -8.474325169

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.974325169, -8.474325169}

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