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

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


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

Reorder the terms:
(4 + -9x)(2 + 3x) = 5x

Multiply (4 + -9x) * (2 + 3x)
(4(2 + 3x) + -9x * (2 + 3x)) = 5x
((2 * 4 + 3x * 4) + -9x * (2 + 3x)) = 5x
((8 + 12x) + -9x * (2 + 3x)) = 5x
(8 + 12x + (2 * -9x + 3x * -9x)) = 5x
(8 + 12x + (-18x + -27x2)) = 5x

Combine like terms: 12x + -18x = -6x
(8 + -6x + -27x2) = 5x

Solving
8 + -6x + -27x2 = 5x

Solving for variable 'x'.

Reorder the terms:
8 + -6x + -5x + -27x2 = 5x + -5x

Combine like terms: -6x + -5x = -11x
8 + -11x + -27x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
8 + -11x + -27x2 = 0

Begin completing the square.  Divide all terms by
-27 the coefficient of the squared term: 

Divide each side by '-27'.
-0.2962962963 + 0.4074074074x + x2 = 0

Move the constant term to the right:

Add '0.2962962963' to each side of the equation.
-0.2962962963 + 0.4074074074x + 0.2962962963 + x2 = 0 + 0.2962962963

Reorder the terms:
-0.2962962963 + 0.2962962963 + 0.4074074074x + x2 = 0 + 0.2962962963

Combine like terms: -0.2962962963 + 0.2962962963 = 0.0000000000
0.0000000000 + 0.4074074074x + x2 = 0 + 0.2962962963
0.4074074074x + x2 = 0 + 0.2962962963

Combine like terms: 0 + 0.2962962963 = 0.2962962963
0.4074074074x + x2 = 0.2962962963

The x term is 0.4074074074x.  Take half its coefficient (0.2037037037).
Square it (0.04149519890) and add it to both sides.

Add '0.04149519890' to each side of the equation.
0.4074074074x + 0.04149519890 + x2 = 0.2962962963 + 0.04149519890

Reorder the terms:
0.04149519890 + 0.4074074074x + x2 = 0.2962962963 + 0.04149519890

Combine like terms: 0.2962962963 + 0.04149519890 = 0.3377914952
0.04149519890 + 0.4074074074x + x2 = 0.3377914952

Factor a perfect square on the left side:
(x + 0.2037037037)(x + 0.2037037037) = 0.3377914952

Calculate the square root of the right side: 0.581198327

Break this problem into two subproblems by setting 
(x + 0.2037037037) equal to 0.581198327 and -0.581198327.

Subproblem 1

x + 0.2037037037 = 0.581198327 Simplifying x + 0.2037037037 = 0.581198327 Reorder the terms: 0.2037037037 + x = 0.581198327 Solving 0.2037037037 + x = 0.581198327 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2037037037' to each side of the equation. 0.2037037037 + -0.2037037037 + x = 0.581198327 + -0.2037037037 Combine like terms: 0.2037037037 + -0.2037037037 = 0.0000000000 0.0000000000 + x = 0.581198327 + -0.2037037037 x = 0.581198327 + -0.2037037037 Combine like terms: 0.581198327 + -0.2037037037 = 0.3774946233 x = 0.3774946233 Simplifying x = 0.3774946233

Subproblem 2

x + 0.2037037037 = -0.581198327 Simplifying x + 0.2037037037 = -0.581198327 Reorder the terms: 0.2037037037 + x = -0.581198327 Solving 0.2037037037 + x = -0.581198327 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2037037037' to each side of the equation. 0.2037037037 + -0.2037037037 + x = -0.581198327 + -0.2037037037 Combine like terms: 0.2037037037 + -0.2037037037 = 0.0000000000 0.0000000000 + x = -0.581198327 + -0.2037037037 x = -0.581198327 + -0.2037037037 Combine like terms: -0.581198327 + -0.2037037037 = -0.7849020307 x = -0.7849020307 Simplifying x = -0.7849020307

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.3774946233, -0.7849020307}

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