(3x-5)*4x=3x+13

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


Simplifying
(3x + -5) * 4x = 3x + 13

Reorder the terms:
(-5 + 3x) * 4x = 3x + 13

Reorder the terms for easier multiplication:
4x(-5 + 3x) = 3x + 13
(-5 * 4x + 3x * 4x) = 3x + 13
(-20x + 12x2) = 3x + 13

Reorder the terms:
-20x + 12x2 = 13 + 3x

Solving
-20x + 12x2 = 13 + 3x

Solving for variable 'x'.

Reorder the terms:
-13 + -20x + -3x + 12x2 = 13 + 3x + -13 + -3x

Combine like terms: -20x + -3x = -23x
-13 + -23x + 12x2 = 13 + 3x + -13 + -3x

Reorder the terms:
-13 + -23x + 12x2 = 13 + -13 + 3x + -3x

Combine like terms: 13 + -13 = 0
-13 + -23x + 12x2 = 0 + 3x + -3x
-13 + -23x + 12x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-13 + -23x + 12x2 = 0

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

Divide each side by '12'.
-1.083333333 + -1.916666667x + x2 = 0

Move the constant term to the right:

Add '1.083333333' to each side of the equation.
-1.083333333 + -1.916666667x + 1.083333333 + x2 = 0 + 1.083333333

Reorder the terms:
-1.083333333 + 1.083333333 + -1.916666667x + x2 = 0 + 1.083333333

Combine like terms: -1.083333333 + 1.083333333 = 0.000000000
0.000000000 + -1.916666667x + x2 = 0 + 1.083333333
-1.916666667x + x2 = 0 + 1.083333333

Combine like terms: 0 + 1.083333333 = 1.083333333
-1.916666667x + x2 = 1.083333333

The x term is -1.916666667x.  Take half its coefficient (-0.9583333335).
Square it (0.9184027781) and add it to both sides.

Add '0.9184027781' to each side of the equation.
-1.916666667x + 0.9184027781 + x2 = 1.083333333 + 0.9184027781

Reorder the terms:
0.9184027781 + -1.916666667x + x2 = 1.083333333 + 0.9184027781

Combine like terms: 1.083333333 + 0.9184027781 = 2.0017361111
0.9184027781 + -1.916666667x + x2 = 2.0017361111

Factor a perfect square on the left side:
(x + -0.9583333335)(x + -0.9583333335) = 2.0017361111

Calculate the square root of the right side: 1.414827237

Break this problem into two subproblems by setting 
(x + -0.9583333335) equal to 1.414827237 and -1.414827237.

Subproblem 1

x + -0.9583333335 = 1.414827237 Simplifying x + -0.9583333335 = 1.414827237 Reorder the terms: -0.9583333335 + x = 1.414827237 Solving -0.9583333335 + x = 1.414827237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9583333335' to each side of the equation. -0.9583333335 + 0.9583333335 + x = 1.414827237 + 0.9583333335 Combine like terms: -0.9583333335 + 0.9583333335 = 0.0000000000 0.0000000000 + x = 1.414827237 + 0.9583333335 x = 1.414827237 + 0.9583333335 Combine like terms: 1.414827237 + 0.9583333335 = 2.3731605705 x = 2.3731605705 Simplifying x = 2.3731605705

Subproblem 2

x + -0.9583333335 = -1.414827237 Simplifying x + -0.9583333335 = -1.414827237 Reorder the terms: -0.9583333335 + x = -1.414827237 Solving -0.9583333335 + x = -1.414827237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9583333335' to each side of the equation. -0.9583333335 + 0.9583333335 + x = -1.414827237 + 0.9583333335 Combine like terms: -0.9583333335 + 0.9583333335 = 0.0000000000 0.0000000000 + x = -1.414827237 + 0.9583333335 x = -1.414827237 + 0.9583333335 Combine like terms: -1.414827237 + 0.9583333335 = -0.4564939035 x = -0.4564939035 Simplifying x = -0.4564939035

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.3731605705, -0.4564939035}

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