(x-5)*4x=-1

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Solution for (x-5)*4x=-1 equation:


Simplifying
(x + -5) * 4x = -1

Reorder the terms:
(-5 + x) * 4x = -1

Reorder the terms for easier multiplication:
4x(-5 + x) = -1
(-5 * 4x + x * 4x) = -1
(-20x + 4x2) = -1

Solving
-20x + 4x2 = -1

Solving for variable 'x'.

Reorder the terms:
1 + -20x + 4x2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + -20x + 4x2 = 0

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

Divide each side by '4'.
0.25 + -5x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -5x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -5x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -5x + x2 = 0 + -0.25
-5x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-5x + x2 = -0.25

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -0.25 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -0.25 + 6.25

Combine like terms: -0.25 + 6.25 = 6
6.25 + -5x + x2 = 6

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + -2.5 = 2.449489743 Simplifying x + -2.5 = 2.449489743 Reorder the terms: -2.5 + x = 2.449489743 Solving -2.5 + x = 2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.449489743 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.449489743 + 2.5 x = 2.449489743 + 2.5 Combine like terms: 2.449489743 + 2.5 = 4.949489743 x = 4.949489743 Simplifying x = 4.949489743

Subproblem 2

x + -2.5 = -2.449489743 Simplifying x + -2.5 = -2.449489743 Reorder the terms: -2.5 + x = -2.449489743 Solving -2.5 + x = -2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.449489743 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.449489743 + 2.5 x = -2.449489743 + 2.5 Combine like terms: -2.449489743 + 2.5 = 0.050510257 x = 0.050510257 Simplifying x = 0.050510257

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.949489743, 0.050510257}

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