x^2+33x+72=0

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Solution for x^2+33x+72=0 equation:


Simplifying
x2 + 33x + 72 = 0

Reorder the terms:
72 + 33x + x2 = 0

Solving
72 + 33x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-72' to each side of the equation.
72 + 33x + -72 + x2 = 0 + -72

Reorder the terms:
72 + -72 + 33x + x2 = 0 + -72

Combine like terms: 72 + -72 = 0
0 + 33x + x2 = 0 + -72
33x + x2 = 0 + -72

Combine like terms: 0 + -72 = -72
33x + x2 = -72

The x term is 33x.  Take half its coefficient (16.5).
Square it (272.25) and add it to both sides.

Add '272.25' to each side of the equation.
33x + 272.25 + x2 = -72 + 272.25

Reorder the terms:
272.25 + 33x + x2 = -72 + 272.25

Combine like terms: -72 + 272.25 = 200.25
272.25 + 33x + x2 = 200.25

Factor a perfect square on the left side:
(x + 16.5)(x + 16.5) = 200.25

Calculate the square root of the right side: 14.150971698

Break this problem into two subproblems by setting 
(x + 16.5) equal to 14.150971698 and -14.150971698.

Subproblem 1

x + 16.5 = 14.150971698 Simplifying x + 16.5 = 14.150971698 Reorder the terms: 16.5 + x = 14.150971698 Solving 16.5 + x = 14.150971698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16.5' to each side of the equation. 16.5 + -16.5 + x = 14.150971698 + -16.5 Combine like terms: 16.5 + -16.5 = 0.0 0.0 + x = 14.150971698 + -16.5 x = 14.150971698 + -16.5 Combine like terms: 14.150971698 + -16.5 = -2.349028302 x = -2.349028302 Simplifying x = -2.349028302

Subproblem 2

x + 16.5 = -14.150971698 Simplifying x + 16.5 = -14.150971698 Reorder the terms: 16.5 + x = -14.150971698 Solving 16.5 + x = -14.150971698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16.5' to each side of the equation. 16.5 + -16.5 + x = -14.150971698 + -16.5 Combine like terms: 16.5 + -16.5 = 0.0 0.0 + x = -14.150971698 + -16.5 x = -14.150971698 + -16.5 Combine like terms: -14.150971698 + -16.5 = -30.650971698 x = -30.650971698 Simplifying x = -30.650971698

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.349028302, -30.650971698}

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