(3x-4)(3x-4)=8

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Solution for (3x-4)(3x-4)=8 equation:


Simplifying
(3x + -4)(3x + -4) = 8

Reorder the terms:
(-4 + 3x)(3x + -4) = 8

Reorder the terms:
(-4 + 3x)(-4 + 3x) = 8

Multiply (-4 + 3x) * (-4 + 3x)
(-4(-4 + 3x) + 3x * (-4 + 3x)) = 8
((-4 * -4 + 3x * -4) + 3x * (-4 + 3x)) = 8
((16 + -12x) + 3x * (-4 + 3x)) = 8
(16 + -12x + (-4 * 3x + 3x * 3x)) = 8
(16 + -12x + (-12x + 9x2)) = 8

Combine like terms: -12x + -12x = -24x
(16 + -24x + 9x2) = 8

Solving
16 + -24x + 9x2 = 8

Solving for variable 'x'.

Reorder the terms:
16 + -8 + -24x + 9x2 = 8 + -8

Combine like terms: 16 + -8 = 8
8 + -24x + 9x2 = 8 + -8

Combine like terms: 8 + -8 = 0
8 + -24x + 9x2 = 0

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

Divide each side by '9'.
0.8888888889 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '-0.8888888889' to each side of the equation.
0.8888888889 + -2.666666667x + -0.8888888889 + x2 = 0 + -0.8888888889

Reorder the terms:
0.8888888889 + -0.8888888889 + -2.666666667x + x2 = 0 + -0.8888888889

Combine like terms: 0.8888888889 + -0.8888888889 = 0.0000000000
0.0000000000 + -2.666666667x + x2 = 0 + -0.8888888889
-2.666666667x + x2 = 0 + -0.8888888889

Combine like terms: 0 + -0.8888888889 = -0.8888888889
-2.666666667x + x2 = -0.8888888889

The x term is -2.666666667x.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667x + 1.777777780 + x2 = -0.8888888889 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = -0.8888888889 + 1.777777780

Combine like terms: -0.8888888889 + 1.777777780 = 0.8888888911
1.777777780 + -2.666666667x + x2 = 0.8888888911

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 0.8888888911

Calculate the square root of the right side: 0.942809043

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 0.942809043 and -0.942809043.

Subproblem 1

x + -1.333333334 = 0.942809043 Simplifying x + -1.333333334 = 0.942809043 Reorder the terms: -1.333333334 + x = 0.942809043 Solving -1.333333334 + x = 0.942809043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 0.942809043 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 0.942809043 + 1.333333334 x = 0.942809043 + 1.333333334 Combine like terms: 0.942809043 + 1.333333334 = 2.276142377 x = 2.276142377 Simplifying x = 2.276142377

Subproblem 2

x + -1.333333334 = -0.942809043 Simplifying x + -1.333333334 = -0.942809043 Reorder the terms: -1.333333334 + x = -0.942809043 Solving -1.333333334 + x = -0.942809043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -0.942809043 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -0.942809043 + 1.333333334 x = -0.942809043 + 1.333333334 Combine like terms: -0.942809043 + 1.333333334 = 0.390524291 x = 0.390524291 Simplifying x = 0.390524291

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.276142377, 0.390524291}

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