0=2x^2+13x-35

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Solution for 0=2x^2+13x-35 equation:


Simplifying
0 = 2x2 + 13x + -35

Reorder the terms:
0 = -35 + 13x + 2x2

Solving
0 = -35 + 13x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + 35 = 35
35 + -13x + -2x2 = -35 + 13x + 2x2 + 35 + -13x + -2x2

Reorder the terms:
35 + -13x + -2x2 = -35 + 35 + 13x + -13x + 2x2 + -2x2

Combine like terms: -35 + 35 = 0
35 + -13x + -2x2 = 0 + 13x + -13x + 2x2 + -2x2
35 + -13x + -2x2 = 13x + -13x + 2x2 + -2x2

Combine like terms: 13x + -13x = 0
35 + -13x + -2x2 = 0 + 2x2 + -2x2
35 + -13x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
35 + -13x + -2x2 = 0

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

Divide each side by '-2'.
-17.5 + 6.5x + x2 = 0

Move the constant term to the right:

Add '17.5' to each side of the equation.
-17.5 + 6.5x + 17.5 + x2 = 0 + 17.5

Reorder the terms:
-17.5 + 17.5 + 6.5x + x2 = 0 + 17.5

Combine like terms: -17.5 + 17.5 = 0.0
0.0 + 6.5x + x2 = 0 + 17.5
6.5x + x2 = 0 + 17.5

Combine like terms: 0 + 17.5 = 17.5
6.5x + x2 = 17.5

The x term is 6.5x.  Take half its coefficient (3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
6.5x + 10.5625 + x2 = 17.5 + 10.5625

Reorder the terms:
10.5625 + 6.5x + x2 = 17.5 + 10.5625

Combine like terms: 17.5 + 10.5625 = 28.0625
10.5625 + 6.5x + x2 = 28.0625

Factor a perfect square on the left side:
(x + 3.25)(x + 3.25) = 28.0625

Calculate the square root of the right side: 5.297405025

Break this problem into two subproblems by setting 
(x + 3.25) equal to 5.297405025 and -5.297405025.

Subproblem 1

x + 3.25 = 5.297405025 Simplifying x + 3.25 = 5.297405025 Reorder the terms: 3.25 + x = 5.297405025 Solving 3.25 + x = 5.297405025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = 5.297405025 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = 5.297405025 + -3.25 x = 5.297405025 + -3.25 Combine like terms: 5.297405025 + -3.25 = 2.047405025 x = 2.047405025 Simplifying x = 2.047405025

Subproblem 2

x + 3.25 = -5.297405025 Simplifying x + 3.25 = -5.297405025 Reorder the terms: 3.25 + x = -5.297405025 Solving 3.25 + x = -5.297405025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = -5.297405025 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = -5.297405025 + -3.25 x = -5.297405025 + -3.25 Combine like terms: -5.297405025 + -3.25 = -8.547405025 x = -8.547405025 Simplifying x = -8.547405025

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.047405025, -8.547405025}

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