(3x+8)(3x-6)=52

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Solution for (3x+8)(3x-6)=52 equation:


Simplifying
(3x + 8)(3x + -6) = 52

Reorder the terms:
(8 + 3x)(3x + -6) = 52

Reorder the terms:
(8 + 3x)(-6 + 3x) = 52

Multiply (8 + 3x) * (-6 + 3x)
(8(-6 + 3x) + 3x * (-6 + 3x)) = 52
((-6 * 8 + 3x * 8) + 3x * (-6 + 3x)) = 52
((-48 + 24x) + 3x * (-6 + 3x)) = 52
(-48 + 24x + (-6 * 3x + 3x * 3x)) = 52
(-48 + 24x + (-18x + 9x2)) = 52

Combine like terms: 24x + -18x = 6x
(-48 + 6x + 9x2) = 52

Solving
-48 + 6x + 9x2 = 52

Solving for variable 'x'.

Reorder the terms:
-48 + -52 + 6x + 9x2 = 52 + -52

Combine like terms: -48 + -52 = -100
-100 + 6x + 9x2 = 52 + -52

Combine like terms: 52 + -52 = 0
-100 + 6x + 9x2 = 0

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

Divide each side by '9'.
-11.11111111 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '11.11111111' to each side of the equation.
-11.11111111 + 0.6666666667x + 11.11111111 + x2 = 0 + 11.11111111

Reorder the terms:
-11.11111111 + 11.11111111 + 0.6666666667x + x2 = 0 + 11.11111111

Combine like terms: -11.11111111 + 11.11111111 = 0.00000000
0.00000000 + 0.6666666667x + x2 = 0 + 11.11111111
0.6666666667x + x2 = 0 + 11.11111111

Combine like terms: 0 + 11.11111111 = 11.11111111
0.6666666667x + x2 = 11.11111111

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = 11.11111111 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 11.11111111 + 0.1111111112

Combine like terms: 11.11111111 + 0.1111111112 = 11.2222222212
0.1111111112 + 0.6666666667x + x2 = 11.2222222212

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 11.2222222212

Calculate the square root of the right side: 3.34995854

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 3.34995854 and -3.34995854.

Subproblem 1

x + 0.3333333334 = 3.34995854 Simplifying x + 0.3333333334 = 3.34995854 Reorder the terms: 0.3333333334 + x = 3.34995854 Solving 0.3333333334 + x = 3.34995854 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 3.34995854 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 3.34995854 + -0.3333333334 x = 3.34995854 + -0.3333333334 Combine like terms: 3.34995854 + -0.3333333334 = 3.0166252066 x = 3.0166252066 Simplifying x = 3.0166252066

Subproblem 2

x + 0.3333333334 = -3.34995854 Simplifying x + 0.3333333334 = -3.34995854 Reorder the terms: 0.3333333334 + x = -3.34995854 Solving 0.3333333334 + x = -3.34995854 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -3.34995854 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -3.34995854 + -0.3333333334 x = -3.34995854 + -0.3333333334 Combine like terms: -3.34995854 + -0.3333333334 = -3.6832918734 x = -3.6832918734 Simplifying x = -3.6832918734

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.0166252066, -3.6832918734}

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