0.197x^2+0.087x-0.473=0

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Solution for 0.197x^2+0.087x-0.473=0 equation:


Simplifying
0.197x2 + 0.087x + -0.473 = 0

Reorder the terms:
-0.473 + 0.087x + 0.197x2 = 0

Solving
-0.473 + 0.087x + 0.197x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.197'.
-2.401015228 + 0.4416243655x + x2 = 0

Move the constant term to the right:

Add '2.401015228' to each side of the equation.
-2.401015228 + 0.4416243655x + 2.401015228 + x2 = 0 + 2.401015228

Reorder the terms:
-2.401015228 + 2.401015228 + 0.4416243655x + x2 = 0 + 2.401015228

Combine like terms: -2.401015228 + 2.401015228 = 0.000000000
0.000000000 + 0.4416243655x + x2 = 0 + 2.401015228
0.4416243655x + x2 = 0 + 2.401015228

Combine like terms: 0 + 2.401015228 = 2.401015228
0.4416243655x + x2 = 2.401015228

The x term is 0.4416243655x.  Take half its coefficient (0.2208121828).
Square it (0.04875802007) and add it to both sides.

Add '0.04875802007' to each side of the equation.
0.4416243655x + 0.04875802007 + x2 = 2.401015228 + 0.04875802007

Reorder the terms:
0.04875802007 + 0.4416243655x + x2 = 2.401015228 + 0.04875802007

Combine like terms: 2.401015228 + 0.04875802007 = 2.44977324807
0.04875802007 + 0.4416243655x + x2 = 2.44977324807

Factor a perfect square on the left side:
(x + 0.2208121828)(x + 0.2208121828) = 2.44977324807

Calculate the square root of the right side: 1.565175149

Break this problem into two subproblems by setting 
(x + 0.2208121828) equal to 1.565175149 and -1.565175149.

Subproblem 1

x + 0.2208121828 = 1.565175149 Simplifying x + 0.2208121828 = 1.565175149 Reorder the terms: 0.2208121828 + x = 1.565175149 Solving 0.2208121828 + x = 1.565175149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2208121828' to each side of the equation. 0.2208121828 + -0.2208121828 + x = 1.565175149 + -0.2208121828 Combine like terms: 0.2208121828 + -0.2208121828 = 0.0000000000 0.0000000000 + x = 1.565175149 + -0.2208121828 x = 1.565175149 + -0.2208121828 Combine like terms: 1.565175149 + -0.2208121828 = 1.3443629662 x = 1.3443629662 Simplifying x = 1.3443629662

Subproblem 2

x + 0.2208121828 = -1.565175149 Simplifying x + 0.2208121828 = -1.565175149 Reorder the terms: 0.2208121828 + x = -1.565175149 Solving 0.2208121828 + x = -1.565175149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2208121828' to each side of the equation. 0.2208121828 + -0.2208121828 + x = -1.565175149 + -0.2208121828 Combine like terms: 0.2208121828 + -0.2208121828 = 0.0000000000 0.0000000000 + x = -1.565175149 + -0.2208121828 x = -1.565175149 + -0.2208121828 Combine like terms: -1.565175149 + -0.2208121828 = -1.7859873318 x = -1.7859873318 Simplifying x = -1.7859873318

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.3443629662, -1.7859873318}

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