x^2-3x-116=0

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Solution for x^2-3x-116=0 equation:


Simplifying
x2 + -3x + -116 = 0

Reorder the terms:
-116 + -3x + x2 = 0

Solving
-116 + -3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '116' to each side of the equation.
-116 + -3x + 116 + x2 = 0 + 116

Reorder the terms:
-116 + 116 + -3x + x2 = 0 + 116

Combine like terms: -116 + 116 = 0
0 + -3x + x2 = 0 + 116
-3x + x2 = 0 + 116

Combine like terms: 0 + 116 = 116
-3x + x2 = 116

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 116 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 116 + 2.25

Combine like terms: 116 + 2.25 = 118.25
2.25 + -3x + x2 = 118.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 118.25

Calculate the square root of the right side: 10.874281585

Break this problem into two subproblems by setting 
(x + -1.5) equal to 10.874281585 and -10.874281585.

Subproblem 1

x + -1.5 = 10.874281585 Simplifying x + -1.5 = 10.874281585 Reorder the terms: -1.5 + x = 10.874281585 Solving -1.5 + x = 10.874281585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 10.874281585 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 10.874281585 + 1.5 x = 10.874281585 + 1.5 Combine like terms: 10.874281585 + 1.5 = 12.374281585 x = 12.374281585 Simplifying x = 12.374281585

Subproblem 2

x + -1.5 = -10.874281585 Simplifying x + -1.5 = -10.874281585 Reorder the terms: -1.5 + x = -10.874281585 Solving -1.5 + x = -10.874281585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -10.874281585 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -10.874281585 + 1.5 x = -10.874281585 + 1.5 Combine like terms: -10.874281585 + 1.5 = -9.374281585 x = -9.374281585 Simplifying x = -9.374281585

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.374281585, -9.374281585}

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