.120x^2+.12+.03=3-x

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Solution for .120x^2+.12+.03=3-x equation:


Simplifying
0.120x2 + 0.12 + 0.03 = 3 + -1x

Reorder the terms:
0.12 + 0.03 + 0.120x2 = 3 + -1x

Combine like terms: 0.12 + 0.03 = 0.15
0.15 + 0.120x2 = 3 + -1x

Solving
0.15 + 0.120x2 = 3 + -1x

Solving for variable 'x'.

Reorder the terms:
0.15 + -3 + x + 0.120x2 = 3 + -1x + -3 + x

Combine like terms: 0.15 + -3 = -2.85
-2.85 + x + 0.120x2 = 3 + -1x + -3 + x

Reorder the terms:
-2.85 + x + 0.120x2 = 3 + -3 + -1x + x

Combine like terms: 3 + -3 = 0
-2.85 + x + 0.120x2 = 0 + -1x + x
-2.85 + x + 0.120x2 = -1x + x

Combine like terms: -1x + x = 0
-2.85 + x + 0.120x2 = 0

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

Divide each side by '0.120'.
-23.75 + 8.333333333x + x2 = 0

Move the constant term to the right:

Add '23.75' to each side of the equation.
-23.75 + 8.333333333x + 23.75 + x2 = 0 + 23.75

Reorder the terms:
-23.75 + 23.75 + 8.333333333x + x2 = 0 + 23.75

Combine like terms: -23.75 + 23.75 = 0.00
0.00 + 8.333333333x + x2 = 0 + 23.75
8.333333333x + x2 = 0 + 23.75

Combine like terms: 0 + 23.75 = 23.75
8.333333333x + x2 = 23.75

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
8.333333333x + 0.25 + x2 = 23.75 + 0.25

Reorder the terms:
0.25 + 8.333333333x + x2 = 23.75 + 0.25

Combine like terms: 23.75 + 0.25 = 24
0.25 + 8.333333333x + x2 = 24

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 24

Calculate the square root of the right side: 4.898979486

Break this problem into two subproblems by setting 
(x + 0.5) equal to 4.898979486 and -4.898979486.

Subproblem 1

x + 0.5 = 4.898979486 Simplifying x + 0.5 = 4.898979486 Reorder the terms: 0.5 + x = 4.898979486 Solving 0.5 + x = 4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 4.898979486 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.898979486 + -0.5 x = 4.898979486 + -0.5 Combine like terms: 4.898979486 + -0.5 = 4.398979486 x = 4.398979486 Simplifying x = 4.398979486

Subproblem 2

x + 0.5 = -4.898979486 Simplifying x + 0.5 = -4.898979486 Reorder the terms: 0.5 + x = -4.898979486 Solving 0.5 + x = -4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -4.898979486 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.898979486 + -0.5 x = -4.898979486 + -0.5 Combine like terms: -4.898979486 + -0.5 = -5.398979486 x = -5.398979486 Simplifying x = -5.398979486

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.398979486, -5.398979486}

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