.25x^2+.666x-.5=0

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Solution for .25x^2+.666x-.5=0 equation:


Simplifying
0.25x2 + 0.666x + -0.5 = 0

Reorder the terms:
-0.5 + 0.666x + 0.25x2 = 0

Solving
-0.5 + 0.666x + 0.25x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.25'.
-2 + 2.664x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 2.664x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + 2.664x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 2.664x + x2 = 0 + 2
2.664x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
2.664x + x2 = 2

The x term is 2.664x.  Take half its coefficient (1.332).
Square it (1.774224) and add it to both sides.

Add '1.774224' to each side of the equation.
2.664x + 1.774224 + x2 = 2 + 1.774224

Reorder the terms:
1.774224 + 2.664x + x2 = 2 + 1.774224

Combine like terms: 2 + 1.774224 = 3.774224
1.774224 + 2.664x + x2 = 3.774224

Factor a perfect square on the left side:
(x + 1.332)(x + 1.332) = 3.774224

Calculate the square root of the right side: 1.942736215

Break this problem into two subproblems by setting 
(x + 1.332) equal to 1.942736215 and -1.942736215.

Subproblem 1

x + 1.332 = 1.942736215 Simplifying x + 1.332 = 1.942736215 Reorder the terms: 1.332 + x = 1.942736215 Solving 1.332 + x = 1.942736215 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.332' to each side of the equation. 1.332 + -1.332 + x = 1.942736215 + -1.332 Combine like terms: 1.332 + -1.332 = 0.000 0.000 + x = 1.942736215 + -1.332 x = 1.942736215 + -1.332 Combine like terms: 1.942736215 + -1.332 = 0.610736215 x = 0.610736215 Simplifying x = 0.610736215

Subproblem 2

x + 1.332 = -1.942736215 Simplifying x + 1.332 = -1.942736215 Reorder the terms: 1.332 + x = -1.942736215 Solving 1.332 + x = -1.942736215 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.332' to each side of the equation. 1.332 + -1.332 + x = -1.942736215 + -1.332 Combine like terms: 1.332 + -1.332 = 0.000 0.000 + x = -1.942736215 + -1.332 x = -1.942736215 + -1.332 Combine like terms: -1.942736215 + -1.332 = -3.274736215 x = -3.274736215 Simplifying x = -3.274736215

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.610736215, -3.274736215}

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