5x^2-108x-228=0

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Solution for 5x^2-108x-228=0 equation:


Simplifying
5x2 + -108x + -228 = 0

Reorder the terms:
-228 + -108x + 5x2 = 0

Solving
-228 + -108x + 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'.
-45.6 + -21.6x + x2 = 0

Move the constant term to the right:

Add '45.6' to each side of the equation.
-45.6 + -21.6x + 45.6 + x2 = 0 + 45.6

Reorder the terms:
-45.6 + 45.6 + -21.6x + x2 = 0 + 45.6

Combine like terms: -45.6 + 45.6 = 0.0
0.0 + -21.6x + x2 = 0 + 45.6
-21.6x + x2 = 0 + 45.6

Combine like terms: 0 + 45.6 = 45.6
-21.6x + x2 = 45.6

The x term is -21.6x.  Take half its coefficient (-10.8).
Square it (116.64) and add it to both sides.

Add '116.64' to each side of the equation.
-21.6x + 116.64 + x2 = 45.6 + 116.64

Reorder the terms:
116.64 + -21.6x + x2 = 45.6 + 116.64

Combine like terms: 45.6 + 116.64 = 162.24
116.64 + -21.6x + x2 = 162.24

Factor a perfect square on the left side:
(x + -10.8)(x + -10.8) = 162.24

Calculate the square root of the right side: 12.737346662

Break this problem into two subproblems by setting 
(x + -10.8) equal to 12.737346662 and -12.737346662.

Subproblem 1

x + -10.8 = 12.737346662 Simplifying x + -10.8 = 12.737346662 Reorder the terms: -10.8 + x = 12.737346662 Solving -10.8 + x = 12.737346662 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.8' to each side of the equation. -10.8 + 10.8 + x = 12.737346662 + 10.8 Combine like terms: -10.8 + 10.8 = 0.0 0.0 + x = 12.737346662 + 10.8 x = 12.737346662 + 10.8 Combine like terms: 12.737346662 + 10.8 = 23.537346662 x = 23.537346662 Simplifying x = 23.537346662

Subproblem 2

x + -10.8 = -12.737346662 Simplifying x + -10.8 = -12.737346662 Reorder the terms: -10.8 + x = -12.737346662 Solving -10.8 + x = -12.737346662 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.8' to each side of the equation. -10.8 + 10.8 + x = -12.737346662 + 10.8 Combine like terms: -10.8 + 10.8 = 0.0 0.0 + x = -12.737346662 + 10.8 x = -12.737346662 + 10.8 Combine like terms: -12.737346662 + 10.8 = -1.937346662 x = -1.937346662 Simplifying x = -1.937346662

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.537346662, -1.937346662}

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