x^2-9x-33=0

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Solution for x^2-9x-33=0 equation:


Simplifying
x2 + -9x + -33 = 0

Reorder the terms:
-33 + -9x + x2 = 0

Solving
-33 + -9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '33' to each side of the equation.
-33 + -9x + 33 + x2 = 0 + 33

Reorder the terms:
-33 + 33 + -9x + x2 = 0 + 33

Combine like terms: -33 + 33 = 0
0 + -9x + x2 = 0 + 33
-9x + x2 = 0 + 33

Combine like terms: 0 + 33 = 33
-9x + x2 = 33

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 33 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 33 + 20.25

Combine like terms: 33 + 20.25 = 53.25
20.25 + -9x + x2 = 53.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 53.25

Calculate the square root of the right side: 7.29725976

Break this problem into two subproblems by setting 
(x + -4.5) equal to 7.29725976 and -7.29725976.

Subproblem 1

x + -4.5 = 7.29725976 Simplifying x + -4.5 = 7.29725976 Reorder the terms: -4.5 + x = 7.29725976 Solving -4.5 + x = 7.29725976 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 7.29725976 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 7.29725976 + 4.5 x = 7.29725976 + 4.5 Combine like terms: 7.29725976 + 4.5 = 11.79725976 x = 11.79725976 Simplifying x = 11.79725976

Subproblem 2

x + -4.5 = -7.29725976 Simplifying x + -4.5 = -7.29725976 Reorder the terms: -4.5 + x = -7.29725976 Solving -4.5 + x = -7.29725976 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -7.29725976 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -7.29725976 + 4.5 x = -7.29725976 + 4.5 Combine like terms: -7.29725976 + 4.5 = -2.79725976 x = -2.79725976 Simplifying x = -2.79725976

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.79725976, -2.79725976}

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