2x^2-x-24=0

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Solution for 2x^2-x-24=0 equation:


Simplifying
2x2 + -1x + -24 = 0

Reorder the terms:
-24 + -1x + 2x2 = 0

Solving
-24 + -1x + 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'.
-12 + -0.5x + x2 = 0

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + -0.5x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + -0.5x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -0.5x + x2 = 0 + 12
-0.5x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
-0.5x + x2 = 12

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 12 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 12 + 0.0625

Combine like terms: 12 + 0.0625 = 12.0625
0.0625 + -0.5x + x2 = 12.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 12.0625

Calculate the square root of the right side: 3.473110997

Break this problem into two subproblems by setting 
(x + -0.25) equal to 3.473110997 and -3.473110997.

Subproblem 1

x + -0.25 = 3.473110997 Simplifying x + -0.25 = 3.473110997 Reorder the terms: -0.25 + x = 3.473110997 Solving -0.25 + x = 3.473110997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 3.473110997 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 3.473110997 + 0.25 x = 3.473110997 + 0.25 Combine like terms: 3.473110997 + 0.25 = 3.723110997 x = 3.723110997 Simplifying x = 3.723110997

Subproblem 2

x + -0.25 = -3.473110997 Simplifying x + -0.25 = -3.473110997 Reorder the terms: -0.25 + x = -3.473110997 Solving -0.25 + x = -3.473110997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -3.473110997 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -3.473110997 + 0.25 x = -3.473110997 + 0.25 Combine like terms: -3.473110997 + 0.25 = -3.223110997 x = -3.223110997 Simplifying x = -3.223110997

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.723110997, -3.223110997}

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