5x^2+33x-55=0

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Solution for 5x^2+33x-55=0 equation:


Simplifying
5x2 + 33x + -55 = 0

Reorder the terms:
-55 + 33x + 5x2 = 0

Solving
-55 + 33x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-11 + 6.6x + x2 = 0

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 6.6x + 11 + x2 = 0 + 11

Reorder the terms:
-11 + 11 + 6.6x + x2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 6.6x + x2 = 0 + 11
6.6x + x2 = 0 + 11

Combine like terms: 0 + 11 = 11
6.6x + x2 = 11

The x term is 6.6x.  Take half its coefficient (3.3).
Square it (10.89) and add it to both sides.

Add '10.89' to each side of the equation.
6.6x + 10.89 + x2 = 11 + 10.89

Reorder the terms:
10.89 + 6.6x + x2 = 11 + 10.89

Combine like terms: 11 + 10.89 = 21.89
10.89 + 6.6x + x2 = 21.89

Factor a perfect square on the left side:
(x + 3.3)(x + 3.3) = 21.89

Calculate the square root of the right side: 4.678675026

Break this problem into two subproblems by setting 
(x + 3.3) equal to 4.678675026 and -4.678675026.

Subproblem 1

x + 3.3 = 4.678675026 Simplifying x + 3.3 = 4.678675026 Reorder the terms: 3.3 + x = 4.678675026 Solving 3.3 + x = 4.678675026 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.3' to each side of the equation. 3.3 + -3.3 + x = 4.678675026 + -3.3 Combine like terms: 3.3 + -3.3 = 0.0 0.0 + x = 4.678675026 + -3.3 x = 4.678675026 + -3.3 Combine like terms: 4.678675026 + -3.3 = 1.378675026 x = 1.378675026 Simplifying x = 1.378675026

Subproblem 2

x + 3.3 = -4.678675026 Simplifying x + 3.3 = -4.678675026 Reorder the terms: 3.3 + x = -4.678675026 Solving 3.3 + x = -4.678675026 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.3' to each side of the equation. 3.3 + -3.3 + x = -4.678675026 + -3.3 Combine like terms: 3.3 + -3.3 = 0.0 0.0 + x = -4.678675026 + -3.3 x = -4.678675026 + -3.3 Combine like terms: -4.678675026 + -3.3 = -7.978675026 x = -7.978675026 Simplifying x = -7.978675026

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.378675026, -7.978675026}

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