(5x^2+33x-15)=0

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Solution for (5x^2+33x-15)=0 equation:


Simplifying
(5x2 + 33x + -15) = 0

Reorder the terms:
(-15 + 33x + 5x2) = 0

Remove parenthesis around (-15 + 33x + 5x2)
-15 + 33x + 5x2 = 0

Solving
-15 + 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'.
-3 + 6.6x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 6.6x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 6.6x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 6.6x + x2 = 0 + 3
6.6x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
6.6x + x2 = 3

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 = 3 + 10.89

Reorder the terms:
10.89 + 6.6x + x2 = 3 + 10.89

Combine like terms: 3 + 10.89 = 13.89
10.89 + 6.6x + x2 = 13.89

Factor a perfect square on the left side:
(x + 3.3)(x + 3.3) = 13.89

Calculate the square root of the right side: 3.726929031

Break this problem into two subproblems by setting 
(x + 3.3) equal to 3.726929031 and -3.726929031.

Subproblem 1

x + 3.3 = 3.726929031 Simplifying x + 3.3 = 3.726929031 Reorder the terms: 3.3 + x = 3.726929031 Solving 3.3 + x = 3.726929031 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 = 3.726929031 + -3.3 Combine like terms: 3.3 + -3.3 = 0.0 0.0 + x = 3.726929031 + -3.3 x = 3.726929031 + -3.3 Combine like terms: 3.726929031 + -3.3 = 0.426929031 x = 0.426929031 Simplifying x = 0.426929031

Subproblem 2

x + 3.3 = -3.726929031 Simplifying x + 3.3 = -3.726929031 Reorder the terms: 3.3 + x = -3.726929031 Solving 3.3 + x = -3.726929031 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 = -3.726929031 + -3.3 Combine like terms: 3.3 + -3.3 = 0.0 0.0 + x = -3.726929031 + -3.3 x = -3.726929031 + -3.3 Combine like terms: -3.726929031 + -3.3 = -7.026929031 x = -7.026929031 Simplifying x = -7.026929031

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.426929031, -7.026929031}

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