-.5714x^2+1.63x-.664255=0

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Solution for -.5714x^2+1.63x-.664255=0 equation:


Simplifying
-0.5714x2 + 1.63x + -0.664255 = 0

Reorder the terms:
-0.664255 + 1.63x + -0.5714x2 = 0

Solving
-0.664255 + 1.63x + -0.5714x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.5714 the coefficient of the squared term: 

Divide each side by '-0.5714'.
1.162504375 + -2.852642632x + x2 = 0

Move the constant term to the right:

Add '-1.162504375' to each side of the equation.
1.162504375 + -2.852642632x + -1.162504375 + x2 = 0 + -1.162504375

Reorder the terms:
1.162504375 + -1.162504375 + -2.852642632x + x2 = 0 + -1.162504375

Combine like terms: 1.162504375 + -1.162504375 = 0.000000000
0.000000000 + -2.852642632x + x2 = 0 + -1.162504375
-2.852642632x + x2 = 0 + -1.162504375

Combine like terms: 0 + -1.162504375 = -1.162504375
-2.852642632x + x2 = -1.162504375

The x term is -2.852642632x.  Take half its coefficient (-1.426321316).
Square it (2.034392496) and add it to both sides.

Add '2.034392496' to each side of the equation.
-2.852642632x + 2.034392496 + x2 = -1.162504375 + 2.034392496

Reorder the terms:
2.034392496 + -2.852642632x + x2 = -1.162504375 + 2.034392496

Combine like terms: -1.162504375 + 2.034392496 = 0.871888121
2.034392496 + -2.852642632x + x2 = 0.871888121

Factor a perfect square on the left side:
(x + -1.426321316)(x + -1.426321316) = 0.871888121

Calculate the square root of the right side: 0.933749496

Break this problem into two subproblems by setting 
(x + -1.426321316) equal to 0.933749496 and -0.933749496.

Subproblem 1

x + -1.426321316 = 0.933749496 Simplifying x + -1.426321316 = 0.933749496 Reorder the terms: -1.426321316 + x = 0.933749496 Solving -1.426321316 + x = 0.933749496 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.426321316' to each side of the equation. -1.426321316 + 1.426321316 + x = 0.933749496 + 1.426321316 Combine like terms: -1.426321316 + 1.426321316 = 0.000000000 0.000000000 + x = 0.933749496 + 1.426321316 x = 0.933749496 + 1.426321316 Combine like terms: 0.933749496 + 1.426321316 = 2.360070812 x = 2.360070812 Simplifying x = 2.360070812

Subproblem 2

x + -1.426321316 = -0.933749496 Simplifying x + -1.426321316 = -0.933749496 Reorder the terms: -1.426321316 + x = -0.933749496 Solving -1.426321316 + x = -0.933749496 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.426321316' to each side of the equation. -1.426321316 + 1.426321316 + x = -0.933749496 + 1.426321316 Combine like terms: -1.426321316 + 1.426321316 = 0.000000000 0.000000000 + x = -0.933749496 + 1.426321316 x = -0.933749496 + 1.426321316 Combine like terms: -0.933749496 + 1.426321316 = 0.49257182 x = 0.49257182 Simplifying x = 0.49257182

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.360070812, 0.49257182}

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