x+(2x+3)-2x(x-5)=6

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Solution for x+(2x+3)-2x(x-5)=6 equation:


Simplifying
x + (2x + 3) + -2x(x + -5) = 6

Reorder the terms:
x + (3 + 2x) + -2x(x + -5) = 6

Remove parenthesis around (3 + 2x)
x + 3 + 2x + -2x(x + -5) = 6

Reorder the terms:
x + 3 + 2x + -2x(-5 + x) = 6
x + 3 + 2x + (-5 * -2x + x * -2x) = 6
x + 3 + 2x + (10x + -2x2) = 6

Reorder the terms:
3 + x + 2x + 10x + -2x2 = 6

Combine like terms: x + 2x = 3x
3 + 3x + 10x + -2x2 = 6

Combine like terms: 3x + 10x = 13x
3 + 13x + -2x2 = 6

Solving
3 + 13x + -2x2 = 6

Solving for variable 'x'.

Reorder the terms:
3 + -6 + 13x + -2x2 = 6 + -6

Combine like terms: 3 + -6 = -3
-3 + 13x + -2x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-3 + 13x + -2x2 = 0

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

Divide each side by '-2'.
1.5 + -6.5x + x2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + -6.5x + -1.5 + x2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + -6.5x + x2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + -6.5x + x2 = 0 + -1.5
-6.5x + x2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
-6.5x + x2 = -1.5

The x term is -6.5x.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5x + 10.5625 + x2 = -1.5 + 10.5625

Reorder the terms:
10.5625 + -6.5x + x2 = -1.5 + 10.5625

Combine like terms: -1.5 + 10.5625 = 9.0625
10.5625 + -6.5x + x2 = 9.0625

Factor a perfect square on the left side:
(x + -3.25)(x + -3.25) = 9.0625

Calculate the square root of the right side: 3.010398645

Break this problem into two subproblems by setting 
(x + -3.25) equal to 3.010398645 and -3.010398645.

Subproblem 1

x + -3.25 = 3.010398645 Simplifying x + -3.25 = 3.010398645 Reorder the terms: -3.25 + x = 3.010398645 Solving -3.25 + x = 3.010398645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = 3.010398645 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = 3.010398645 + 3.25 x = 3.010398645 + 3.25 Combine like terms: 3.010398645 + 3.25 = 6.260398645 x = 6.260398645 Simplifying x = 6.260398645

Subproblem 2

x + -3.25 = -3.010398645 Simplifying x + -3.25 = -3.010398645 Reorder the terms: -3.25 + x = -3.010398645 Solving -3.25 + x = -3.010398645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = -3.010398645 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = -3.010398645 + 3.25 x = -3.010398645 + 3.25 Combine like terms: -3.010398645 + 3.25 = 0.239601355 x = 0.239601355 Simplifying x = 0.239601355

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.260398645, 0.239601355}

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