2x^2+14x-235=0

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Solution for 2x^2+14x-235=0 equation:


Simplifying
2x2 + 14x + -235 = 0

Reorder the terms:
-235 + 14x + 2x2 = 0

Solving
-235 + 14x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-117.5 + 7x + x2 = 0

Move the constant term to the right:

Add '117.5' to each side of the equation.
-117.5 + 7x + 117.5 + x2 = 0 + 117.5

Reorder the terms:
-117.5 + 117.5 + 7x + x2 = 0 + 117.5

Combine like terms: -117.5 + 117.5 = 0.0
0.0 + 7x + x2 = 0 + 117.5
7x + x2 = 0 + 117.5

Combine like terms: 0 + 117.5 = 117.5
7x + x2 = 117.5

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 117.5 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 117.5 + 12.25

Combine like terms: 117.5 + 12.25 = 129.75
12.25 + 7x + x2 = 129.75

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 129.75

Calculate the square root of the right side: 11.39078575

Break this problem into two subproblems by setting 
(x + 3.5) equal to 11.39078575 and -11.39078575.

Subproblem 1

x + 3.5 = 11.39078575 Simplifying x + 3.5 = 11.39078575 Reorder the terms: 3.5 + x = 11.39078575 Solving 3.5 + x = 11.39078575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 11.39078575 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 11.39078575 + -3.5 x = 11.39078575 + -3.5 Combine like terms: 11.39078575 + -3.5 = 7.89078575 x = 7.89078575 Simplifying x = 7.89078575

Subproblem 2

x + 3.5 = -11.39078575 Simplifying x + 3.5 = -11.39078575 Reorder the terms: 3.5 + x = -11.39078575 Solving 3.5 + x = -11.39078575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -11.39078575 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -11.39078575 + -3.5 x = -11.39078575 + -3.5 Combine like terms: -11.39078575 + -3.5 = -14.89078575 x = -14.89078575 Simplifying x = -14.89078575

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.89078575, -14.89078575}

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