x+x^2=43.2

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Solution for x+x^2=43.2 equation:


Simplifying
x + x2 = 43.2

Solving
x + x2 = 43.2

Solving for variable 'x'.

Reorder the terms:
-43.2 + x + x2 = 43.2 + -43.2

Combine like terms: 43.2 + -43.2 = 0.0
-43.2 + x + x2 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '43.2' to each side of the equation.
-43.2 + x + 43.2 + x2 = 0.0 + 43.2

Reorder the terms:
-43.2 + 43.2 + x + x2 = 0.0 + 43.2

Combine like terms: -43.2 + 43.2 = 0.0
0.0 + x + x2 = 0.0 + 43.2
x + x2 = 0.0 + 43.2

Combine like terms: 0.0 + 43.2 = 43.2
x + x2 = 43.2

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.
x + 0.25 + x2 = 43.2 + 0.25

Reorder the terms:
0.25 + x + x2 = 43.2 + 0.25

Combine like terms: 43.2 + 0.25 = 43.45
0.25 + x + x2 = 43.45

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 43.45

Calculate the square root of the right side: 6.591661399

Break this problem into two subproblems by setting 
(x + 0.5) equal to 6.591661399 and -6.591661399.

Subproblem 1

x + 0.5 = 6.591661399 Simplifying x + 0.5 = 6.591661399 Reorder the terms: 0.5 + x = 6.591661399 Solving 0.5 + x = 6.591661399 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 = 6.591661399 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 6.591661399 + -0.5 x = 6.591661399 + -0.5 Combine like terms: 6.591661399 + -0.5 = 6.091661399 x = 6.091661399 Simplifying x = 6.091661399

Subproblem 2

x + 0.5 = -6.591661399 Simplifying x + 0.5 = -6.591661399 Reorder the terms: 0.5 + x = -6.591661399 Solving 0.5 + x = -6.591661399 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 = -6.591661399 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -6.591661399 + -0.5 x = -6.591661399 + -0.5 Combine like terms: -6.591661399 + -0.5 = -7.091661399 x = -7.091661399 Simplifying x = -7.091661399

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.091661399, -7.091661399}

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