x=4x+0.1x^2-296.4

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Solution for x=4x+0.1x^2-296.4 equation:


Simplifying
x = 4x + 0.1x2 + -296.4

Reorder the terms:
x = -296.4 + 4x + 0.1x2

Solving
x = -296.4 + 4x + 0.1x2

Solving for variable 'x'.

Reorder the terms:
296.4 + x + -4x + -0.1x2 = -296.4 + 4x + 0.1x2 + 296.4 + -4x + -0.1x2

Combine like terms: x + -4x = -3x
296.4 + -3x + -0.1x2 = -296.4 + 4x + 0.1x2 + 296.4 + -4x + -0.1x2

Reorder the terms:
296.4 + -3x + -0.1x2 = -296.4 + 296.4 + 4x + -4x + 0.1x2 + -0.1x2

Combine like terms: -296.4 + 296.4 = 0.0
296.4 + -3x + -0.1x2 = 0.0 + 4x + -4x + 0.1x2 + -0.1x2
296.4 + -3x + -0.1x2 = 4x + -4x + 0.1x2 + -0.1x2

Combine like terms: 4x + -4x = 0
296.4 + -3x + -0.1x2 = 0 + 0.1x2 + -0.1x2
296.4 + -3x + -0.1x2 = 0.1x2 + -0.1x2

Combine like terms: 0.1x2 + -0.1x2 = 0.0
296.4 + -3x + -0.1x2 = 0.0

Begin completing the square.  Divide all terms by
-0.1 the coefficient of the squared term: 

Divide each side by '-0.1'.
-2964 + 30x + x2 = 0

Move the constant term to the right:

Add '2964' to each side of the equation.
-2964 + 30x + 2964 + x2 = 0 + 2964

Reorder the terms:
-2964 + 2964 + 30x + x2 = 0 + 2964

Combine like terms: -2964 + 2964 = 0
0 + 30x + x2 = 0 + 2964
30x + x2 = 0 + 2964

Combine like terms: 0 + 2964 = 2964
30x + x2 = 2964

The x term is 30x.  Take half its coefficient (15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
30x + 225 + x2 = 2964 + 225

Reorder the terms:
225 + 30x + x2 = 2964 + 225

Combine like terms: 2964 + 225 = 3189
225 + 30x + x2 = 3189

Factor a perfect square on the left side:
(x + 15)(x + 15) = 3189

Calculate the square root of the right side: 56.471231614

Break this problem into two subproblems by setting 
(x + 15) equal to 56.471231614 and -56.471231614.

Subproblem 1

x + 15 = 56.471231614 Simplifying x + 15 = 56.471231614 Reorder the terms: 15 + x = 56.471231614 Solving 15 + x = 56.471231614 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 56.471231614 + -15 Combine like terms: 15 + -15 = 0 0 + x = 56.471231614 + -15 x = 56.471231614 + -15 Combine like terms: 56.471231614 + -15 = 41.471231614 x = 41.471231614 Simplifying x = 41.471231614

Subproblem 2

x + 15 = -56.471231614 Simplifying x + 15 = -56.471231614 Reorder the terms: 15 + x = -56.471231614 Solving 15 + x = -56.471231614 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = -56.471231614 + -15 Combine like terms: 15 + -15 = 0 0 + x = -56.471231614 + -15 x = -56.471231614 + -15 Combine like terms: -56.471231614 + -15 = -71.471231614 x = -71.471231614 Simplifying x = -71.471231614

Solution

The solution to the problem is based on the solutions from the subproblems. x = {41.471231614, -71.471231614}

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