x+14x^2-240=0

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Solution for x+14x^2-240=0 equation:


Simplifying
x + 14x2 + -240 = 0

Reorder the terms:
-240 + x + 14x2 = 0

Solving
-240 + x + 14x2 = 0

Solving for variable 'x'.

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

Divide each side by '14'.
-17.14285714 + 0.07142857143x + x2 = 0

Move the constant term to the right:

Add '17.14285714' to each side of the equation.
-17.14285714 + 0.07142857143x + 17.14285714 + x2 = 0 + 17.14285714

Reorder the terms:
-17.14285714 + 17.14285714 + 0.07142857143x + x2 = 0 + 17.14285714

Combine like terms: -17.14285714 + 17.14285714 = 0.00000000
0.00000000 + 0.07142857143x + x2 = 0 + 17.14285714
0.07142857143x + x2 = 0 + 17.14285714

Combine like terms: 0 + 17.14285714 = 17.14285714
0.07142857143x + x2 = 17.14285714

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.
0.07142857143x + 0.25 + x2 = 17.14285714 + 0.25

Reorder the terms:
0.25 + 0.07142857143x + x2 = 17.14285714 + 0.25

Combine like terms: 17.14285714 + 0.25 = 17.39285714
0.25 + 0.07142857143x + x2 = 17.39285714

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 17.39285714

Calculate the square root of the right side: 4.17047445

Break this problem into two subproblems by setting 
(x + 0.5) equal to 4.17047445 and -4.17047445.

Subproblem 1

x + 0.5 = 4.17047445 Simplifying x + 0.5 = 4.17047445 Reorder the terms: 0.5 + x = 4.17047445 Solving 0.5 + x = 4.17047445 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 = 4.17047445 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.17047445 + -0.5 x = 4.17047445 + -0.5 Combine like terms: 4.17047445 + -0.5 = 3.67047445 x = 3.67047445 Simplifying x = 3.67047445

Subproblem 2

x + 0.5 = -4.17047445 Simplifying x + 0.5 = -4.17047445 Reorder the terms: 0.5 + x = -4.17047445 Solving 0.5 + x = -4.17047445 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 = -4.17047445 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.17047445 + -0.5 x = -4.17047445 + -0.5 Combine like terms: -4.17047445 + -0.5 = -4.67047445 x = -4.67047445 Simplifying x = -4.67047445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.67047445, -4.67047445}

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