-0.2x^2+0.03x+2=0

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Solution for -0.2x^2+0.03x+2=0 equation:


Simplifying
-0.2x2 + 0.03x + 2 = 0

Reorder the terms:
2 + 0.03x + -0.2x2 = 0

Solving
2 + 0.03x + -0.2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.2 the coefficient of the squared term: 

Divide each side by '-0.2'.
-10 + -0.15x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -0.15x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -0.15x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -0.15x + x2 = 0 + 10
-0.15x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-0.15x + x2 = 10

The x term is -0.15x.  Take half its coefficient (-0.075).
Square it (0.005625) and add it to both sides.

Add '0.005625' to each side of the equation.
-0.15x + 0.005625 + x2 = 10 + 0.005625

Reorder the terms:
0.005625 + -0.15x + x2 = 10 + 0.005625

Combine like terms: 10 + 0.005625 = 10.005625
0.005625 + -0.15x + x2 = 10.005625

Factor a perfect square on the left side:
(x + -0.075)(x + -0.075) = 10.005625

Calculate the square root of the right side: 3.163166926

Break this problem into two subproblems by setting 
(x + -0.075) equal to 3.163166926 and -3.163166926.

Subproblem 1

x + -0.075 = 3.163166926 Simplifying x + -0.075 = 3.163166926 Reorder the terms: -0.075 + x = 3.163166926 Solving -0.075 + x = 3.163166926 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.075' to each side of the equation. -0.075 + 0.075 + x = 3.163166926 + 0.075 Combine like terms: -0.075 + 0.075 = 0.000 0.000 + x = 3.163166926 + 0.075 x = 3.163166926 + 0.075 Combine like terms: 3.163166926 + 0.075 = 3.238166926 x = 3.238166926 Simplifying x = 3.238166926

Subproblem 2

x + -0.075 = -3.163166926 Simplifying x + -0.075 = -3.163166926 Reorder the terms: -0.075 + x = -3.163166926 Solving -0.075 + x = -3.163166926 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.075' to each side of the equation. -0.075 + 0.075 + x = -3.163166926 + 0.075 Combine like terms: -0.075 + 0.075 = 0.000 0.000 + x = -3.163166926 + 0.075 x = -3.163166926 + 0.075 Combine like terms: -3.163166926 + 0.075 = -3.088166926 x = -3.088166926 Simplifying x = -3.088166926

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.238166926, -3.088166926}

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