2x^2+33x-28=0

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Solution for 2x^2+33x-28=0 equation:


Simplifying
2x2 + 33x + -28 = 0

Reorder the terms:
-28 + 33x + 2x2 = 0

Solving
-28 + 33x + 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'.
-14 + 16.5x + x2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 16.5x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + 16.5x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 16.5x + x2 = 0 + 14
16.5x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
16.5x + x2 = 14

The x term is 16.5x.  Take half its coefficient (8.25).
Square it (68.0625) and add it to both sides.

Add '68.0625' to each side of the equation.
16.5x + 68.0625 + x2 = 14 + 68.0625

Reorder the terms:
68.0625 + 16.5x + x2 = 14 + 68.0625

Combine like terms: 14 + 68.0625 = 82.0625
68.0625 + 16.5x + x2 = 82.0625

Factor a perfect square on the left side:
(x + 8.25)(x + 8.25) = 82.0625

Calculate the square root of the right side: 9.058835466

Break this problem into two subproblems by setting 
(x + 8.25) equal to 9.058835466 and -9.058835466.

Subproblem 1

x + 8.25 = 9.058835466 Simplifying x + 8.25 = 9.058835466 Reorder the terms: 8.25 + x = 9.058835466 Solving 8.25 + x = 9.058835466 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.25' to each side of the equation. 8.25 + -8.25 + x = 9.058835466 + -8.25 Combine like terms: 8.25 + -8.25 = 0.00 0.00 + x = 9.058835466 + -8.25 x = 9.058835466 + -8.25 Combine like terms: 9.058835466 + -8.25 = 0.808835466 x = 0.808835466 Simplifying x = 0.808835466

Subproblem 2

x + 8.25 = -9.058835466 Simplifying x + 8.25 = -9.058835466 Reorder the terms: 8.25 + x = -9.058835466 Solving 8.25 + x = -9.058835466 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.25' to each side of the equation. 8.25 + -8.25 + x = -9.058835466 + -8.25 Combine like terms: 8.25 + -8.25 = 0.00 0.00 + x = -9.058835466 + -8.25 x = -9.058835466 + -8.25 Combine like terms: -9.058835466 + -8.25 = -17.308835466 x = -17.308835466 Simplifying x = -17.308835466

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.808835466, -17.308835466}

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