.25x^2-.0833x-.166=0

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Solution for .25x^2-.0833x-.166=0 equation:


Simplifying
0.25x2 + -0.0833x + -0.166 = 0

Reorder the terms:
-0.166 + -0.0833x + 0.25x2 = 0

Solving
-0.166 + -0.0833x + 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'.
-0.664 + -0.3332x + x2 = 0

Move the constant term to the right:

Add '0.664' to each side of the equation.
-0.664 + -0.3332x + 0.664 + x2 = 0 + 0.664

Reorder the terms:
-0.664 + 0.664 + -0.3332x + x2 = 0 + 0.664

Combine like terms: -0.664 + 0.664 = 0.000
0.000 + -0.3332x + x2 = 0 + 0.664
-0.3332x + x2 = 0 + 0.664

Combine like terms: 0 + 0.664 = 0.664
-0.3332x + x2 = 0.664

The x term is -0.3332x.  Take half its coefficient (-0.1666).
Square it (0.02775556) and add it to both sides.

Add '0.02775556' to each side of the equation.
-0.3332x + 0.02775556 + x2 = 0.664 + 0.02775556

Reorder the terms:
0.02775556 + -0.3332x + x2 = 0.664 + 0.02775556

Combine like terms: 0.664 + 0.02775556 = 0.69175556
0.02775556 + -0.3332x + x2 = 0.69175556

Factor a perfect square on the left side:
(x + -0.1666)(x + -0.1666) = 0.69175556

Calculate the square root of the right side: 0.831718438

Break this problem into two subproblems by setting 
(x + -0.1666) equal to 0.831718438 and -0.831718438.

Subproblem 1

x + -0.1666 = 0.831718438 Simplifying x + -0.1666 = 0.831718438 Reorder the terms: -0.1666 + x = 0.831718438 Solving -0.1666 + x = 0.831718438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666' to each side of the equation. -0.1666 + 0.1666 + x = 0.831718438 + 0.1666 Combine like terms: -0.1666 + 0.1666 = 0.0000 0.0000 + x = 0.831718438 + 0.1666 x = 0.831718438 + 0.1666 Combine like terms: 0.831718438 + 0.1666 = 0.998318438 x = 0.998318438 Simplifying x = 0.998318438

Subproblem 2

x + -0.1666 = -0.831718438 Simplifying x + -0.1666 = -0.831718438 Reorder the terms: -0.1666 + x = -0.831718438 Solving -0.1666 + x = -0.831718438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666' to each side of the equation. -0.1666 + 0.1666 + x = -0.831718438 + 0.1666 Combine like terms: -0.1666 + 0.1666 = 0.0000 0.0000 + x = -0.831718438 + 0.1666 x = -0.831718438 + 0.1666 Combine like terms: -0.831718438 + 0.1666 = -0.665118438 x = -0.665118438 Simplifying x = -0.665118438

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.998318438, -0.665118438}

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