2x^2-54x-225=0

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Solution for 2x^2-54x-225=0 equation:


Simplifying
2x2 + -54x + -225 = 0

Reorder the terms:
-225 + -54x + 2x2 = 0

Solving
-225 + -54x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-112.5 + -27x + x2 = 0

Move the constant term to the right:

Add '112.5' to each side of the equation.
-112.5 + -27x + 112.5 + x2 = 0 + 112.5

Reorder the terms:
-112.5 + 112.5 + -27x + x2 = 0 + 112.5

Combine like terms: -112.5 + 112.5 = 0.0
0.0 + -27x + x2 = 0 + 112.5
-27x + x2 = 0 + 112.5

Combine like terms: 0 + 112.5 = 112.5
-27x + x2 = 112.5

The x term is -27x.  Take half its coefficient (-13.5).
Square it (182.25) and add it to both sides.

Add '182.25' to each side of the equation.
-27x + 182.25 + x2 = 112.5 + 182.25

Reorder the terms:
182.25 + -27x + x2 = 112.5 + 182.25

Combine like terms: 112.5 + 182.25 = 294.75
182.25 + -27x + x2 = 294.75

Factor a perfect square on the left side:
(x + -13.5)(x + -13.5) = 294.75

Calculate the square root of the right side: 17.168284713

Break this problem into two subproblems by setting 
(x + -13.5) equal to 17.168284713 and -17.168284713.

Subproblem 1

x + -13.5 = 17.168284713 Simplifying x + -13.5 = 17.168284713 Reorder the terms: -13.5 + x = 17.168284713 Solving -13.5 + x = 17.168284713 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13.5' to each side of the equation. -13.5 + 13.5 + x = 17.168284713 + 13.5 Combine like terms: -13.5 + 13.5 = 0.0 0.0 + x = 17.168284713 + 13.5 x = 17.168284713 + 13.5 Combine like terms: 17.168284713 + 13.5 = 30.668284713 x = 30.668284713 Simplifying x = 30.668284713

Subproblem 2

x + -13.5 = -17.168284713 Simplifying x + -13.5 = -17.168284713 Reorder the terms: -13.5 + x = -17.168284713 Solving -13.5 + x = -17.168284713 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13.5' to each side of the equation. -13.5 + 13.5 + x = -17.168284713 + 13.5 Combine like terms: -13.5 + 13.5 = 0.0 0.0 + x = -17.168284713 + 13.5 x = -17.168284713 + 13.5 Combine like terms: -17.168284713 + 13.5 = -3.668284713 x = -3.668284713 Simplifying x = -3.668284713

Solution

The solution to the problem is based on the solutions from the subproblems. x = {30.668284713, -3.668284713}

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