100x^2-181x+8.1=0

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Solution for 100x^2-181x+8.1=0 equation:


Simplifying
100x2 + -181x + 8.1 = 0

Reorder the terms:
8.1 + -181x + 100x2 = 0

Solving
8.1 + -181x + 100x2 = 0

Solving for variable 'x'.

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

Divide each side by '100'.
0.081 + -1.81x + x2 = 0

Move the constant term to the right:

Add '-0.081' to each side of the equation.
0.081 + -1.81x + -0.081 + x2 = 0 + -0.081

Reorder the terms:
0.081 + -0.081 + -1.81x + x2 = 0 + -0.081

Combine like terms: 0.081 + -0.081 = 0.000
0.000 + -1.81x + x2 = 0 + -0.081
-1.81x + x2 = 0 + -0.081

Combine like terms: 0 + -0.081 = -0.081
-1.81x + x2 = -0.081

The x term is -1.81x.  Take half its coefficient (-0.905).
Square it (0.819025) and add it to both sides.

Add '0.819025' to each side of the equation.
-1.81x + 0.819025 + x2 = -0.081 + 0.819025

Reorder the terms:
0.819025 + -1.81x + x2 = -0.081 + 0.819025

Combine like terms: -0.081 + 0.819025 = 0.738025
0.819025 + -1.81x + x2 = 0.738025

Factor a perfect square on the left side:
(x + -0.905)(x + -0.905) = 0.738025

Calculate the square root of the right side: 0.859083814

Break this problem into two subproblems by setting 
(x + -0.905) equal to 0.859083814 and -0.859083814.

Subproblem 1

x + -0.905 = 0.859083814 Simplifying x + -0.905 = 0.859083814 Reorder the terms: -0.905 + x = 0.859083814 Solving -0.905 + x = 0.859083814 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.905' to each side of the equation. -0.905 + 0.905 + x = 0.859083814 + 0.905 Combine like terms: -0.905 + 0.905 = 0.000 0.000 + x = 0.859083814 + 0.905 x = 0.859083814 + 0.905 Combine like terms: 0.859083814 + 0.905 = 1.764083814 x = 1.764083814 Simplifying x = 1.764083814

Subproblem 2

x + -0.905 = -0.859083814 Simplifying x + -0.905 = -0.859083814 Reorder the terms: -0.905 + x = -0.859083814 Solving -0.905 + x = -0.859083814 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.905' to each side of the equation. -0.905 + 0.905 + x = -0.859083814 + 0.905 Combine like terms: -0.905 + 0.905 = 0.000 0.000 + x = -0.859083814 + 0.905 x = -0.859083814 + 0.905 Combine like terms: -0.859083814 + 0.905 = 0.045916186 x = 0.045916186 Simplifying x = 0.045916186

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.764083814, 0.045916186}

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