4x^2+30x+33=0

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Solution for 4x^2+30x+33=0 equation:


Simplifying
4x2 + 30x + 33 = 0

Reorder the terms:
33 + 30x + 4x2 = 0

Solving
33 + 30x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
8.25 + 7.5x + x2 = 0

Move the constant term to the right:

Add '-8.25' to each side of the equation.
8.25 + 7.5x + -8.25 + x2 = 0 + -8.25

Reorder the terms:
8.25 + -8.25 + 7.5x + x2 = 0 + -8.25

Combine like terms: 8.25 + -8.25 = 0.00
0.00 + 7.5x + x2 = 0 + -8.25
7.5x + x2 = 0 + -8.25

Combine like terms: 0 + -8.25 = -8.25
7.5x + x2 = -8.25

The x term is 7.5x.  Take half its coefficient (3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
7.5x + 14.0625 + x2 = -8.25 + 14.0625

Reorder the terms:
14.0625 + 7.5x + x2 = -8.25 + 14.0625

Combine like terms: -8.25 + 14.0625 = 5.8125
14.0625 + 7.5x + x2 = 5.8125

Factor a perfect square on the left side:
(x + 3.75)(x + 3.75) = 5.8125

Calculate the square root of the right side: 2.41091269

Break this problem into two subproblems by setting 
(x + 3.75) equal to 2.41091269 and -2.41091269.

Subproblem 1

x + 3.75 = 2.41091269 Simplifying x + 3.75 = 2.41091269 Reorder the terms: 3.75 + x = 2.41091269 Solving 3.75 + x = 2.41091269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = 2.41091269 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = 2.41091269 + -3.75 x = 2.41091269 + -3.75 Combine like terms: 2.41091269 + -3.75 = -1.33908731 x = -1.33908731 Simplifying x = -1.33908731

Subproblem 2

x + 3.75 = -2.41091269 Simplifying x + 3.75 = -2.41091269 Reorder the terms: 3.75 + x = -2.41091269 Solving 3.75 + x = -2.41091269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = -2.41091269 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = -2.41091269 + -3.75 x = -2.41091269 + -3.75 Combine like terms: -2.41091269 + -3.75 = -6.16091269 x = -6.16091269 Simplifying x = -6.16091269

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.33908731, -6.16091269}

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