12x*x+8x=189

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Solution for 12x*x+8x=189 equation:


Simplifying
12x * x + 8x = 189

Multiply x * x
12x2 + 8x = 189

Reorder the terms:
8x + 12x2 = 189

Solving
8x + 12x2 = 189

Solving for variable 'x'.

Reorder the terms:
-189 + 8x + 12x2 = 189 + -189

Combine like terms: 189 + -189 = 0
-189 + 8x + 12x2 = 0

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

Divide each side by '12'.
-15.75 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '15.75' to each side of the equation.
-15.75 + 0.6666666667x + 15.75 + x2 = 0 + 15.75

Reorder the terms:
-15.75 + 15.75 + 0.6666666667x + x2 = 0 + 15.75

Combine like terms: -15.75 + 15.75 = 0.00
0.00 + 0.6666666667x + x2 = 0 + 15.75
0.6666666667x + x2 = 0 + 15.75

Combine like terms: 0 + 15.75 = 15.75
0.6666666667x + x2 = 15.75

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 = 15.75 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 15.75 + 0.1111111112

Combine like terms: 15.75 + 0.1111111112 = 15.8611111112
0.1111111112 + 0.6666666667x + x2 = 15.8611111112

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 15.8611111112

Calculate the square root of the right side: 3.982601048

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 3.982601048 and -3.982601048.

Subproblem 1

x + 0.3333333334 = 3.982601048 Simplifying x + 0.3333333334 = 3.982601048 Reorder the terms: 0.3333333334 + x = 3.982601048 Solving 0.3333333334 + x = 3.982601048 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 = 3.982601048 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 3.982601048 + -0.3333333334 x = 3.982601048 + -0.3333333334 Combine like terms: 3.982601048 + -0.3333333334 = 3.6492677146 x = 3.6492677146 Simplifying x = 3.6492677146

Subproblem 2

x + 0.3333333334 = -3.982601048 Simplifying x + 0.3333333334 = -3.982601048 Reorder the terms: 0.3333333334 + x = -3.982601048 Solving 0.3333333334 + x = -3.982601048 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 = -3.982601048 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -3.982601048 + -0.3333333334 x = -3.982601048 + -0.3333333334 Combine like terms: -3.982601048 + -0.3333333334 = -4.3159343814 x = -4.3159343814 Simplifying x = -4.3159343814

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.6492677146, -4.3159343814}

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