-1.85x^2+10x+2=0

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Solution for -1.85x^2+10x+2=0 equation:


Simplifying
-1.85x2 + 10x + 2 = 0

Reorder the terms:
2 + 10x + -1.85x2 = 0

Solving
2 + 10x + -1.85x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1.85 the coefficient of the squared term: 

Divide each side by '-1.85'.
-1.081081081 + -5.405405405x + x2 = 0

Move the constant term to the right:

Add '1.081081081' to each side of the equation.
-1.081081081 + -5.405405405x + 1.081081081 + x2 = 0 + 1.081081081

Reorder the terms:
-1.081081081 + 1.081081081 + -5.405405405x + x2 = 0 + 1.081081081

Combine like terms: -1.081081081 + 1.081081081 = 0.000000000
0.000000000 + -5.405405405x + x2 = 0 + 1.081081081
-5.405405405x + x2 = 0 + 1.081081081

Combine like terms: 0 + 1.081081081 = 1.081081081
-5.405405405x + x2 = 1.081081081

The x term is -5.405405405x.  Take half its coefficient (-2.702702703).
Square it (7.304601901) and add it to both sides.

Add '7.304601901' to each side of the equation.
-5.405405405x + 7.304601901 + x2 = 1.081081081 + 7.304601901

Reorder the terms:
7.304601901 + -5.405405405x + x2 = 1.081081081 + 7.304601901

Combine like terms: 1.081081081 + 7.304601901 = 8.385682982
7.304601901 + -5.405405405x + x2 = 8.385682982

Factor a perfect square on the left side:
(x + -2.702702703)(x + -2.702702703) = 8.385682982

Calculate the square root of the right side: 2.895804376

Break this problem into two subproblems by setting 
(x + -2.702702703) equal to 2.895804376 and -2.895804376.

Subproblem 1

x + -2.702702703 = 2.895804376 Simplifying x + -2.702702703 = 2.895804376 Reorder the terms: -2.702702703 + x = 2.895804376 Solving -2.702702703 + x = 2.895804376 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.702702703' to each side of the equation. -2.702702703 + 2.702702703 + x = 2.895804376 + 2.702702703 Combine like terms: -2.702702703 + 2.702702703 = 0.000000000 0.000000000 + x = 2.895804376 + 2.702702703 x = 2.895804376 + 2.702702703 Combine like terms: 2.895804376 + 2.702702703 = 5.598507079 x = 5.598507079 Simplifying x = 5.598507079

Subproblem 2

x + -2.702702703 = -2.895804376 Simplifying x + -2.702702703 = -2.895804376 Reorder the terms: -2.702702703 + x = -2.895804376 Solving -2.702702703 + x = -2.895804376 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.702702703' to each side of the equation. -2.702702703 + 2.702702703 + x = -2.895804376 + 2.702702703 Combine like terms: -2.702702703 + 2.702702703 = 0.000000000 0.000000000 + x = -2.895804376 + 2.702702703 x = -2.895804376 + 2.702702703 Combine like terms: -2.895804376 + 2.702702703 = -0.193101673 x = -0.193101673 Simplifying x = -0.193101673

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.598507079, -0.193101673}

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