8.14x^2+3.88x=5.85

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Solution for 8.14x^2+3.88x=5.85 equation:


Simplifying
8.14x2 + 3.88x = 5.85

Reorder the terms:
3.88x + 8.14x2 = 5.85

Solving
3.88x + 8.14x2 = 5.85

Solving for variable 'x'.

Reorder the terms:
-5.85 + 3.88x + 8.14x2 = 5.85 + -5.85

Combine like terms: 5.85 + -5.85 = 0.00
-5.85 + 3.88x + 8.14x2 = 0.00

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

Divide each side by '8.14'.
-0.7186732187 + 0.4766584767x + x2 = 0

Move the constant term to the right:

Add '0.7186732187' to each side of the equation.
-0.7186732187 + 0.4766584767x + 0.7186732187 + x2 = 0 + 0.7186732187

Reorder the terms:
-0.7186732187 + 0.7186732187 + 0.4766584767x + x2 = 0 + 0.7186732187

Combine like terms: -0.7186732187 + 0.7186732187 = 0.0000000000
0.0000000000 + 0.4766584767x + x2 = 0 + 0.7186732187
0.4766584767x + x2 = 0 + 0.7186732187

Combine like terms: 0 + 0.7186732187 = 0.7186732187
0.4766584767x + x2 = 0.7186732187

The x term is 0.4766584767x.  Take half its coefficient (0.2383292384).
Square it (0.05680082588) and add it to both sides.

Add '0.05680082588' to each side of the equation.
0.4766584767x + 0.05680082588 + x2 = 0.7186732187 + 0.05680082588

Reorder the terms:
0.05680082588 + 0.4766584767x + x2 = 0.7186732187 + 0.05680082588

Combine like terms: 0.7186732187 + 0.05680082588 = 0.77547404458
0.05680082588 + 0.4766584767x + x2 = 0.77547404458

Factor a perfect square on the left side:
(x + 0.2383292384)(x + 0.2383292384) = 0.77547404458

Calculate the square root of the right side: 0.880610041

Break this problem into two subproblems by setting 
(x + 0.2383292384) equal to 0.880610041 and -0.880610041.

Subproblem 1

x + 0.2383292384 = 0.880610041 Simplifying x + 0.2383292384 = 0.880610041 Reorder the terms: 0.2383292384 + x = 0.880610041 Solving 0.2383292384 + x = 0.880610041 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2383292384' to each side of the equation. 0.2383292384 + -0.2383292384 + x = 0.880610041 + -0.2383292384 Combine like terms: 0.2383292384 + -0.2383292384 = 0.0000000000 0.0000000000 + x = 0.880610041 + -0.2383292384 x = 0.880610041 + -0.2383292384 Combine like terms: 0.880610041 + -0.2383292384 = 0.6422808026 x = 0.6422808026 Simplifying x = 0.6422808026

Subproblem 2

x + 0.2383292384 = -0.880610041 Simplifying x + 0.2383292384 = -0.880610041 Reorder the terms: 0.2383292384 + x = -0.880610041 Solving 0.2383292384 + x = -0.880610041 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2383292384' to each side of the equation. 0.2383292384 + -0.2383292384 + x = -0.880610041 + -0.2383292384 Combine like terms: 0.2383292384 + -0.2383292384 = 0.0000000000 0.0000000000 + x = -0.880610041 + -0.2383292384 x = -0.880610041 + -0.2383292384 Combine like terms: -0.880610041 + -0.2383292384 = -1.1189392794 x = -1.1189392794 Simplifying x = -1.1189392794

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6422808026, -1.1189392794}

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