8x^2=12x+1

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Solution for 8x^2=12x+1 equation:


Simplifying
8x2 = 12x + 1

Reorder the terms:
8x2 = 1 + 12x

Solving
8x2 = 1 + 12x

Solving for variable 'x'.

Reorder the terms:
-1 + -12x + 8x2 = 1 + 12x + -1 + -12x

Reorder the terms:
-1 + -12x + 8x2 = 1 + -1 + 12x + -12x

Combine like terms: 1 + -1 = 0
-1 + -12x + 8x2 = 0 + 12x + -12x
-1 + -12x + 8x2 = 12x + -12x

Combine like terms: 12x + -12x = 0
-1 + -12x + 8x2 = 0

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

Divide each side by '8'.
-0.125 + -1.5x + x2 = 0

Move the constant term to the right:

Add '0.125' to each side of the equation.
-0.125 + -1.5x + 0.125 + x2 = 0 + 0.125

Reorder the terms:
-0.125 + 0.125 + -1.5x + x2 = 0 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + -1.5x + x2 = 0 + 0.125
-1.5x + x2 = 0 + 0.125

Combine like terms: 0 + 0.125 = 0.125
-1.5x + x2 = 0.125

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 0.125 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 0.125 + 0.5625

Combine like terms: 0.125 + 0.5625 = 0.6875
0.5625 + -1.5x + x2 = 0.6875

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 0.6875

Calculate the square root of the right side: 0.829156198

Break this problem into two subproblems by setting 
(x + -0.75) equal to 0.829156198 and -0.829156198.

Subproblem 1

x + -0.75 = 0.829156198 Simplifying x + -0.75 = 0.829156198 Reorder the terms: -0.75 + x = 0.829156198 Solving -0.75 + x = 0.829156198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 0.829156198 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 0.829156198 + 0.75 x = 0.829156198 + 0.75 Combine like terms: 0.829156198 + 0.75 = 1.579156198 x = 1.579156198 Simplifying x = 1.579156198

Subproblem 2

x + -0.75 = -0.829156198 Simplifying x + -0.75 = -0.829156198 Reorder the terms: -0.75 + x = -0.829156198 Solving -0.75 + x = -0.829156198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -0.829156198 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -0.829156198 + 0.75 x = -0.829156198 + 0.75 Combine like terms: -0.829156198 + 0.75 = -0.079156198 x = -0.079156198 Simplifying x = -0.079156198

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.579156198, -0.079156198}

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