-x(13+4x)=-3(5-9x)+2

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Solution for -x(13+4x)=-3(5-9x)+2 equation:


Simplifying
-1x(13 + 4x) = -3(5 + -9x) + 2
(13 * -1x + 4x * -1x) = -3(5 + -9x) + 2
(-13x + -4x2) = -3(5 + -9x) + 2
-13x + -4x2 = (5 * -3 + -9x * -3) + 2
-13x + -4x2 = (-15 + 27x) + 2

Reorder the terms:
-13x + -4x2 = -15 + 2 + 27x

Combine like terms: -15 + 2 = -13
-13x + -4x2 = -13 + 27x

Solving
-13x + -4x2 = -13 + 27x

Solving for variable 'x'.

Reorder the terms:
13 + -13x + -27x + -4x2 = -13 + 27x + 13 + -27x

Combine like terms: -13x + -27x = -40x
13 + -40x + -4x2 = -13 + 27x + 13 + -27x

Reorder the terms:
13 + -40x + -4x2 = -13 + 13 + 27x + -27x

Combine like terms: -13 + 13 = 0
13 + -40x + -4x2 = 0 + 27x + -27x
13 + -40x + -4x2 = 27x + -27x

Combine like terms: 27x + -27x = 0
13 + -40x + -4x2 = 0

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

Divide each side by '-4'.
-3.25 + 10x + x2 = 0

Move the constant term to the right:

Add '3.25' to each side of the equation.
-3.25 + 10x + 3.25 + x2 = 0 + 3.25

Reorder the terms:
-3.25 + 3.25 + 10x + x2 = 0 + 3.25

Combine like terms: -3.25 + 3.25 = 0.00
0.00 + 10x + x2 = 0 + 3.25
10x + x2 = 0 + 3.25

Combine like terms: 0 + 3.25 = 3.25
10x + x2 = 3.25

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 3.25 + 25

Reorder the terms:
25 + 10x + x2 = 3.25 + 25

Combine like terms: 3.25 + 25 = 28.25
25 + 10x + x2 = 28.25

Factor a perfect square on the left side:
(x + 5)(x + 5) = 28.25

Calculate the square root of the right side: 5.315072906

Break this problem into two subproblems by setting 
(x + 5) equal to 5.315072906 and -5.315072906.

Subproblem 1

x + 5 = 5.315072906 Simplifying x + 5 = 5.315072906 Reorder the terms: 5 + x = 5.315072906 Solving 5 + x = 5.315072906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 5.315072906 + -5 Combine like terms: 5 + -5 = 0 0 + x = 5.315072906 + -5 x = 5.315072906 + -5 Combine like terms: 5.315072906 + -5 = 0.315072906 x = 0.315072906 Simplifying x = 0.315072906

Subproblem 2

x + 5 = -5.315072906 Simplifying x + 5 = -5.315072906 Reorder the terms: 5 + x = -5.315072906 Solving 5 + x = -5.315072906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -5.315072906 + -5 Combine like terms: 5 + -5 = 0 0 + x = -5.315072906 + -5 x = -5.315072906 + -5 Combine like terms: -5.315072906 + -5 = -10.315072906 x = -10.315072906 Simplifying x = -10.315072906

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.315072906, -10.315072906}

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