0=2x^2+33x-65

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Solution for 0=2x^2+33x-65 equation:


Simplifying
0 = 2x2 + 33x + -65

Reorder the terms:
0 = -65 + 33x + 2x2

Solving
0 = -65 + 33x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + 65 = 65
65 + -33x + -2x2 = -65 + 33x + 2x2 + 65 + -33x + -2x2

Reorder the terms:
65 + -33x + -2x2 = -65 + 65 + 33x + -33x + 2x2 + -2x2

Combine like terms: -65 + 65 = 0
65 + -33x + -2x2 = 0 + 33x + -33x + 2x2 + -2x2
65 + -33x + -2x2 = 33x + -33x + 2x2 + -2x2

Combine like terms: 33x + -33x = 0
65 + -33x + -2x2 = 0 + 2x2 + -2x2
65 + -33x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
65 + -33x + -2x2 = 0

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

Divide each side by '-2'.
-32.5 + 16.5x + x2 = 0

Move the constant term to the right:

Add '32.5' to each side of the equation.
-32.5 + 16.5x + 32.5 + x2 = 0 + 32.5

Reorder the terms:
-32.5 + 32.5 + 16.5x + x2 = 0 + 32.5

Combine like terms: -32.5 + 32.5 = 0.0
0.0 + 16.5x + x2 = 0 + 32.5
16.5x + x2 = 0 + 32.5

Combine like terms: 0 + 32.5 = 32.5
16.5x + x2 = 32.5

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 = 32.5 + 68.0625

Reorder the terms:
68.0625 + 16.5x + x2 = 32.5 + 68.0625

Combine like terms: 32.5 + 68.0625 = 100.5625
68.0625 + 16.5x + x2 = 100.5625

Factor a perfect square on the left side:
(x + 8.25)(x + 8.25) = 100.5625

Calculate the square root of the right side: 10.02808556

Break this problem into two subproblems by setting 
(x + 8.25) equal to 10.02808556 and -10.02808556.

Subproblem 1

x + 8.25 = 10.02808556 Simplifying x + 8.25 = 10.02808556 Reorder the terms: 8.25 + x = 10.02808556 Solving 8.25 + x = 10.02808556 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 = 10.02808556 + -8.25 Combine like terms: 8.25 + -8.25 = 0.00 0.00 + x = 10.02808556 + -8.25 x = 10.02808556 + -8.25 Combine like terms: 10.02808556 + -8.25 = 1.77808556 x = 1.77808556 Simplifying x = 1.77808556

Subproblem 2

x + 8.25 = -10.02808556 Simplifying x + 8.25 = -10.02808556 Reorder the terms: 8.25 + x = -10.02808556 Solving 8.25 + x = -10.02808556 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 = -10.02808556 + -8.25 Combine like terms: 8.25 + -8.25 = 0.00 0.00 + x = -10.02808556 + -8.25 x = -10.02808556 + -8.25 Combine like terms: -10.02808556 + -8.25 = -18.27808556 x = -18.27808556 Simplifying x = -18.27808556

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.77808556, -18.27808556}

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