2.64x^2-22.44x-11.88=0

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Solution for 2.64x^2-22.44x-11.88=0 equation:


Simplifying
2.64x2 + -22.44x + -11.88 = 0

Reorder the terms:
-11.88 + -22.44x + 2.64x2 = 0

Solving
-11.88 + -22.44x + 2.64x2 = 0

Solving for variable 'x'.

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

Divide each side by '2.64'.
-4.5 + -8.5x + x2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + -8.5x + 4.5 + x2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + -8.5x + x2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + -8.5x + x2 = 0 + 4.5
-8.5x + x2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
-8.5x + x2 = 4.5

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = 4.5 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = 4.5 + 18.0625

Combine like terms: 4.5 + 18.0625 = 22.5625
18.0625 + -8.5x + x2 = 22.5625

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = 22.5625

Calculate the square root of the right side: 4.75

Break this problem into two subproblems by setting 
(x + -4.25) equal to 4.75 and -4.75.

Subproblem 1

x + -4.25 = 4.75 Simplifying x + -4.25 = 4.75 Reorder the terms: -4.25 + x = 4.75 Solving -4.25 + x = 4.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = 4.75 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = 4.75 + 4.25 x = 4.75 + 4.25 Combine like terms: 4.75 + 4.25 = 9 x = 9 Simplifying x = 9

Subproblem 2

x + -4.25 = -4.75 Simplifying x + -4.25 = -4.75 Reorder the terms: -4.25 + x = -4.75 Solving -4.25 + x = -4.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = -4.75 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = -4.75 + 4.25 x = -4.75 + 4.25 Combine like terms: -4.75 + 4.25 = -0.5 x = -0.5 Simplifying x = -0.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9, -0.5}

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