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

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


Simplifying
3(2x2 + 3) = 4(2x + 3)

Reorder the terms:
3(3 + 2x2) = 4(2x + 3)
(3 * 3 + 2x2 * 3) = 4(2x + 3)
(9 + 6x2) = 4(2x + 3)

Reorder the terms:
9 + 6x2 = 4(3 + 2x)
9 + 6x2 = (3 * 4 + 2x * 4)
9 + 6x2 = (12 + 8x)

Solving
9 + 6x2 = 12 + 8x

Solving for variable 'x'.

Reorder the terms:
9 + -12 + -8x + 6x2 = 12 + 8x + -12 + -8x

Combine like terms: 9 + -12 = -3
-3 + -8x + 6x2 = 12 + 8x + -12 + -8x

Reorder the terms:
-3 + -8x + 6x2 = 12 + -12 + 8x + -8x

Combine like terms: 12 + -12 = 0
-3 + -8x + 6x2 = 0 + 8x + -8x
-3 + -8x + 6x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-3 + -8x + 6x2 = 0

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

Divide each side by '6'.
-0.5 + -1.333333333x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -1.333333333x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -1.333333333x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -1.333333333x + x2 = 0 + 0.5
-1.333333333x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-1.333333333x + x2 = 0.5

The x term is -1.333333333x.  Take half its coefficient (-0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
-1.333333333x + 0.4444444442 + x2 = 0.5 + 0.4444444442

Reorder the terms:
0.4444444442 + -1.333333333x + x2 = 0.5 + 0.4444444442

Combine like terms: 0.5 + 0.4444444442 = 0.9444444442
0.4444444442 + -1.333333333x + x2 = 0.9444444442

Factor a perfect square on the left side:
(x + -0.6666666665)(x + -0.6666666665) = 0.9444444442

Calculate the square root of the right side: 0.971825316

Break this problem into two subproblems by setting 
(x + -0.6666666665) equal to 0.971825316 and -0.971825316.

Subproblem 1

x + -0.6666666665 = 0.971825316 Simplifying x + -0.6666666665 = 0.971825316 Reorder the terms: -0.6666666665 + x = 0.971825316 Solving -0.6666666665 + x = 0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = 0.971825316 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = 0.971825316 + 0.6666666665 x = 0.971825316 + 0.6666666665 Combine like terms: 0.971825316 + 0.6666666665 = 1.6384919825 x = 1.6384919825 Simplifying x = 1.6384919825

Subproblem 2

x + -0.6666666665 = -0.971825316 Simplifying x + -0.6666666665 = -0.971825316 Reorder the terms: -0.6666666665 + x = -0.971825316 Solving -0.6666666665 + x = -0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = -0.971825316 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = -0.971825316 + 0.6666666665 x = -0.971825316 + 0.6666666665 Combine like terms: -0.971825316 + 0.6666666665 = -0.3051586495 x = -0.3051586495 Simplifying x = -0.3051586495

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.6384919825, -0.3051586495}

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