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

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


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

Reorder the terms:
2(5 + 3x) = 3x(4x + 5)
(5 * 2 + 3x * 2) = 3x(4x + 5)
(10 + 6x) = 3x(4x + 5)

Reorder the terms:
10 + 6x = 3x(5 + 4x)
10 + 6x = (5 * 3x + 4x * 3x)
10 + 6x = (15x + 12x2)

Solving
10 + 6x = 15x + 12x2

Solving for variable 'x'.

Combine like terms: 6x + -15x = -9x
10 + -9x + -12x2 = 15x + 12x2 + -15x + -12x2

Reorder the terms:
10 + -9x + -12x2 = 15x + -15x + 12x2 + -12x2

Combine like terms: 15x + -15x = 0
10 + -9x + -12x2 = 0 + 12x2 + -12x2
10 + -9x + -12x2 = 12x2 + -12x2

Combine like terms: 12x2 + -12x2 = 0
10 + -9x + -12x2 = 0

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

Divide each side by '-12'.
-0.8333333333 + 0.75x + x2 = 0

Move the constant term to the right:

Add '0.8333333333' to each side of the equation.
-0.8333333333 + 0.75x + 0.8333333333 + x2 = 0 + 0.8333333333

Reorder the terms:
-0.8333333333 + 0.8333333333 + 0.75x + x2 = 0 + 0.8333333333

Combine like terms: -0.8333333333 + 0.8333333333 = 0.0000000000
0.0000000000 + 0.75x + x2 = 0 + 0.8333333333
0.75x + x2 = 0 + 0.8333333333

Combine like terms: 0 + 0.8333333333 = 0.8333333333
0.75x + x2 = 0.8333333333

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = 0.8333333333 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = 0.8333333333 + 0.140625

Combine like terms: 0.8333333333 + 0.140625 = 0.9739583333
0.140625 + 0.75x + x2 = 0.9739583333

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 0.9739583333

Calculate the square root of the right side: 0.986893274

Break this problem into two subproblems by setting 
(x + 0.375) equal to 0.986893274 and -0.986893274.

Subproblem 1

x + 0.375 = 0.986893274 Simplifying x + 0.375 = 0.986893274 Reorder the terms: 0.375 + x = 0.986893274 Solving 0.375 + x = 0.986893274 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 0.986893274 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 0.986893274 + -0.375 x = 0.986893274 + -0.375 Combine like terms: 0.986893274 + -0.375 = 0.611893274 x = 0.611893274 Simplifying x = 0.611893274

Subproblem 2

x + 0.375 = -0.986893274 Simplifying x + 0.375 = -0.986893274 Reorder the terms: 0.375 + x = -0.986893274 Solving 0.375 + x = -0.986893274 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -0.986893274 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -0.986893274 + -0.375 x = -0.986893274 + -0.375 Combine like terms: -0.986893274 + -0.375 = -1.361893274 x = -1.361893274 Simplifying x = -1.361893274

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.611893274, -1.361893274}

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