12x^2-25x+8=0

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Solution for 12x^2-25x+8=0 equation:


Simplifying
12x2 + -25x + 8 = 0

Reorder the terms:
8 + -25x + 12x2 = 0

Solving
8 + -25x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
0.6666666667 + -2.083333333x + x2 = 0

Move the constant term to the right:

Add '-0.6666666667' to each side of the equation.
0.6666666667 + -2.083333333x + -0.6666666667 + x2 = 0 + -0.6666666667

Reorder the terms:
0.6666666667 + -0.6666666667 + -2.083333333x + x2 = 0 + -0.6666666667

Combine like terms: 0.6666666667 + -0.6666666667 = 0.0000000000
0.0000000000 + -2.083333333x + x2 = 0 + -0.6666666667
-2.083333333x + x2 = 0 + -0.6666666667

Combine like terms: 0 + -0.6666666667 = -0.6666666667
-2.083333333x + x2 = -0.6666666667

The x term is -2.083333333x.  Take half its coefficient (-1.041666667).
Square it (1.085069445) and add it to both sides.

Add '1.085069445' to each side of the equation.
-2.083333333x + 1.085069445 + x2 = -0.6666666667 + 1.085069445

Reorder the terms:
1.085069445 + -2.083333333x + x2 = -0.6666666667 + 1.085069445

Combine like terms: -0.6666666667 + 1.085069445 = 0.4184027783
1.085069445 + -2.083333333x + x2 = 0.4184027783

Factor a perfect square on the left side:
(x + -1.041666667)(x + -1.041666667) = 0.4184027783

Calculate the square root of the right side: 0.646840613

Break this problem into two subproblems by setting 
(x + -1.041666667) equal to 0.646840613 and -0.646840613.

Subproblem 1

x + -1.041666667 = 0.646840613 Simplifying x + -1.041666667 = 0.646840613 Reorder the terms: -1.041666667 + x = 0.646840613 Solving -1.041666667 + x = 0.646840613 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.041666667' to each side of the equation. -1.041666667 + 1.041666667 + x = 0.646840613 + 1.041666667 Combine like terms: -1.041666667 + 1.041666667 = 0.000000000 0.000000000 + x = 0.646840613 + 1.041666667 x = 0.646840613 + 1.041666667 Combine like terms: 0.646840613 + 1.041666667 = 1.68850728 x = 1.68850728 Simplifying x = 1.68850728

Subproblem 2

x + -1.041666667 = -0.646840613 Simplifying x + -1.041666667 = -0.646840613 Reorder the terms: -1.041666667 + x = -0.646840613 Solving -1.041666667 + x = -0.646840613 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.041666667' to each side of the equation. -1.041666667 + 1.041666667 + x = -0.646840613 + 1.041666667 Combine like terms: -1.041666667 + 1.041666667 = 0.000000000 0.000000000 + x = -0.646840613 + 1.041666667 x = -0.646840613 + 1.041666667 Combine like terms: -0.646840613 + 1.041666667 = 0.394826054 x = 0.394826054 Simplifying x = 0.394826054

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.68850728, 0.394826054}

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