10x(x-2)=5-(x+4)

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Solution for 10x(x-2)=5-(x+4) equation:


Simplifying
10x(x + -2) = 5 + -1(x + 4)

Reorder the terms:
10x(-2 + x) = 5 + -1(x + 4)
(-2 * 10x + x * 10x) = 5 + -1(x + 4)
(-20x + 10x2) = 5 + -1(x + 4)

Reorder the terms:
-20x + 10x2 = 5 + -1(4 + x)
-20x + 10x2 = 5 + (4 * -1 + x * -1)
-20x + 10x2 = 5 + (-4 + -1x)

Combine like terms: 5 + -4 = 1
-20x + 10x2 = 1 + -1x

Solving
-20x + 10x2 = 1 + -1x

Solving for variable 'x'.

Reorder the terms:
-1 + -20x + x + 10x2 = 1 + -1x + -1 + x

Combine like terms: -20x + x = -19x
-1 + -19x + 10x2 = 1 + -1x + -1 + x

Reorder the terms:
-1 + -19x + 10x2 = 1 + -1 + -1x + x

Combine like terms: 1 + -1 = 0
-1 + -19x + 10x2 = 0 + -1x + x
-1 + -19x + 10x2 = -1x + x

Combine like terms: -1x + x = 0
-1 + -19x + 10x2 = 0

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

Divide each side by '10'.
-0.1 + -1.9x + x2 = 0

Move the constant term to the right:

Add '0.1' to each side of the equation.
-0.1 + -1.9x + 0.1 + x2 = 0 + 0.1

Reorder the terms:
-0.1 + 0.1 + -1.9x + x2 = 0 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + -1.9x + x2 = 0 + 0.1
-1.9x + x2 = 0 + 0.1

Combine like terms: 0 + 0.1 = 0.1
-1.9x + x2 = 0.1

The x term is -1.9x.  Take half its coefficient (-0.95).
Square it (0.9025) and add it to both sides.

Add '0.9025' to each side of the equation.
-1.9x + 0.9025 + x2 = 0.1 + 0.9025

Reorder the terms:
0.9025 + -1.9x + x2 = 0.1 + 0.9025

Combine like terms: 0.1 + 0.9025 = 1.0025
0.9025 + -1.9x + x2 = 1.0025

Factor a perfect square on the left side:
(x + -0.95)(x + -0.95) = 1.0025

Calculate the square root of the right side: 1.00124922

Break this problem into two subproblems by setting 
(x + -0.95) equal to 1.00124922 and -1.00124922.

Subproblem 1

x + -0.95 = 1.00124922 Simplifying x + -0.95 = 1.00124922 Reorder the terms: -0.95 + x = 1.00124922 Solving -0.95 + x = 1.00124922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = 1.00124922 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = 1.00124922 + 0.95 x = 1.00124922 + 0.95 Combine like terms: 1.00124922 + 0.95 = 1.95124922 x = 1.95124922 Simplifying x = 1.95124922

Subproblem 2

x + -0.95 = -1.00124922 Simplifying x + -0.95 = -1.00124922 Reorder the terms: -0.95 + x = -1.00124922 Solving -0.95 + x = -1.00124922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = -1.00124922 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = -1.00124922 + 0.95 x = -1.00124922 + 0.95 Combine like terms: -1.00124922 + 0.95 = -0.05124922 x = -0.05124922 Simplifying x = -0.05124922

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.95124922, -0.05124922}

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