2x+x^2=432

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Solution for 2x+x^2=432 equation:


Simplifying
2x + x2 = 432

Solving
2x + x2 = 432

Solving for variable 'x'.

Reorder the terms:
-432 + 2x + x2 = 432 + -432

Combine like terms: 432 + -432 = 0
-432 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '432' to each side of the equation.
-432 + 2x + 432 + x2 = 0 + 432

Reorder the terms:
-432 + 432 + 2x + x2 = 0 + 432

Combine like terms: -432 + 432 = 0
0 + 2x + x2 = 0 + 432
2x + x2 = 0 + 432

Combine like terms: 0 + 432 = 432
2x + x2 = 432

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 432 + 1

Reorder the terms:
1 + 2x + x2 = 432 + 1

Combine like terms: 432 + 1 = 433
1 + 2x + x2 = 433

Factor a perfect square on the left side:
(x + 1)(x + 1) = 433

Calculate the square root of the right side: 20.808652047

Break this problem into two subproblems by setting 
(x + 1) equal to 20.808652047 and -20.808652047.

Subproblem 1

x + 1 = 20.808652047 Simplifying x + 1 = 20.808652047 Reorder the terms: 1 + x = 20.808652047 Solving 1 + x = 20.808652047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 20.808652047 + -1 Combine like terms: 1 + -1 = 0 0 + x = 20.808652047 + -1 x = 20.808652047 + -1 Combine like terms: 20.808652047 + -1 = 19.808652047 x = 19.808652047 Simplifying x = 19.808652047

Subproblem 2

x + 1 = -20.808652047 Simplifying x + 1 = -20.808652047 Reorder the terms: 1 + x = -20.808652047 Solving 1 + x = -20.808652047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -20.808652047 + -1 Combine like terms: 1 + -1 = 0 0 + x = -20.808652047 + -1 x = -20.808652047 + -1 Combine like terms: -20.808652047 + -1 = -21.808652047 x = -21.808652047 Simplifying x = -21.808652047

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.808652047, -21.808652047}

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