2.3x^2-1.9x=6.8

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Solution for 2.3x^2-1.9x=6.8 equation:


Simplifying
2.3x2 + -1.9x = 6.8

Reorder the terms:
-1.9x + 2.3x2 = 6.8

Solving
-1.9x + 2.3x2 = 6.8

Solving for variable 'x'.

Reorder the terms:
-6.8 + -1.9x + 2.3x2 = 6.8 + -6.8

Combine like terms: 6.8 + -6.8 = 0.0
-6.8 + -1.9x + 2.3x2 = 0.0

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

Divide each side by '2.3'.
-2.956521739 + -0.8260869565x + x2 = 0

Move the constant term to the right:

Add '2.956521739' to each side of the equation.
-2.956521739 + -0.8260869565x + 2.956521739 + x2 = 0 + 2.956521739

Reorder the terms:
-2.956521739 + 2.956521739 + -0.8260869565x + x2 = 0 + 2.956521739

Combine like terms: -2.956521739 + 2.956521739 = 0.000000000
0.000000000 + -0.8260869565x + x2 = 0 + 2.956521739
-0.8260869565x + x2 = 0 + 2.956521739

Combine like terms: 0 + 2.956521739 = 2.956521739
-0.8260869565x + x2 = 2.956521739

The x term is -0.8260869565x.  Take half its coefficient (-0.4130434783).
Square it (0.1706049150) and add it to both sides.

Add '0.1706049150' to each side of the equation.
-0.8260869565x + 0.1706049150 + x2 = 2.956521739 + 0.1706049150

Reorder the terms:
0.1706049150 + -0.8260869565x + x2 = 2.956521739 + 0.1706049150

Combine like terms: 2.956521739 + 0.1706049150 = 3.127126654
0.1706049150 + -0.8260869565x + x2 = 3.127126654

Factor a perfect square on the left side:
(x + -0.4130434783)(x + -0.4130434783) = 3.127126654

Calculate the square root of the right side: 1.768368359

Break this problem into two subproblems by setting 
(x + -0.4130434783) equal to 1.768368359 and -1.768368359.

Subproblem 1

x + -0.4130434783 = 1.768368359 Simplifying x + -0.4130434783 = 1.768368359 Reorder the terms: -0.4130434783 + x = 1.768368359 Solving -0.4130434783 + x = 1.768368359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4130434783' to each side of the equation. -0.4130434783 + 0.4130434783 + x = 1.768368359 + 0.4130434783 Combine like terms: -0.4130434783 + 0.4130434783 = 0.0000000000 0.0000000000 + x = 1.768368359 + 0.4130434783 x = 1.768368359 + 0.4130434783 Combine like terms: 1.768368359 + 0.4130434783 = 2.1814118373 x = 2.1814118373 Simplifying x = 2.1814118373

Subproblem 2

x + -0.4130434783 = -1.768368359 Simplifying x + -0.4130434783 = -1.768368359 Reorder the terms: -0.4130434783 + x = -1.768368359 Solving -0.4130434783 + x = -1.768368359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4130434783' to each side of the equation. -0.4130434783 + 0.4130434783 + x = -1.768368359 + 0.4130434783 Combine like terms: -0.4130434783 + 0.4130434783 = 0.0000000000 0.0000000000 + x = -1.768368359 + 0.4130434783 x = -1.768368359 + 0.4130434783 Combine like terms: -1.768368359 + 0.4130434783 = -1.3553248807 x = -1.3553248807 Simplifying x = -1.3553248807

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.1814118373, -1.3553248807}

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