2x^2-25x-54=0

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Solution for 2x^2-25x-54=0 equation:


Simplifying
2x2 + -25x + -54 = 0

Reorder the terms:
-54 + -25x + 2x2 = 0

Solving
-54 + -25x + 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'.
-27 + -12.5x + x2 = 0

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -12.5x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + -12.5x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -12.5x + x2 = 0 + 27
-12.5x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
-12.5x + x2 = 27

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = 27 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = 27 + 39.0625

Combine like terms: 27 + 39.0625 = 66.0625
39.0625 + -12.5x + x2 = 66.0625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 66.0625

Calculate the square root of the right side: 8.127884104

Break this problem into two subproblems by setting 
(x + -6.25) equal to 8.127884104 and -8.127884104.

Subproblem 1

x + -6.25 = 8.127884104 Simplifying x + -6.25 = 8.127884104 Reorder the terms: -6.25 + x = 8.127884104 Solving -6.25 + x = 8.127884104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = 8.127884104 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 8.127884104 + 6.25 x = 8.127884104 + 6.25 Combine like terms: 8.127884104 + 6.25 = 14.377884104 x = 14.377884104 Simplifying x = 14.377884104

Subproblem 2

x + -6.25 = -8.127884104 Simplifying x + -6.25 = -8.127884104 Reorder the terms: -6.25 + x = -8.127884104 Solving -6.25 + x = -8.127884104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = -8.127884104 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -8.127884104 + 6.25 x = -8.127884104 + 6.25 Combine like terms: -8.127884104 + 6.25 = -1.877884104 x = -1.877884104 Simplifying x = -1.877884104

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.377884104, -1.877884104}

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