X^2-8X-114=0

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Solution for X^2-8X-114=0 equation:


Simplifying
X2 + -8X + -114 = 0

Reorder the terms:
-114 + -8X + X2 = 0

Solving
-114 + -8X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '114' to each side of the equation.
-114 + -8X + 114 + X2 = 0 + 114

Reorder the terms:
-114 + 114 + -8X + X2 = 0 + 114

Combine like terms: -114 + 114 = 0
0 + -8X + X2 = 0 + 114
-8X + X2 = 0 + 114

Combine like terms: 0 + 114 = 114
-8X + X2 = 114

The X term is -8X.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8X + 16 + X2 = 114 + 16

Reorder the terms:
16 + -8X + X2 = 114 + 16

Combine like terms: 114 + 16 = 130
16 + -8X + X2 = 130

Factor a perfect square on the left side:
(X + -4)(X + -4) = 130

Calculate the square root of the right side: 11.401754251

Break this problem into two subproblems by setting 
(X + -4) equal to 11.401754251 and -11.401754251.

Subproblem 1

X + -4 = 11.401754251 Simplifying X + -4 = 11.401754251 Reorder the terms: -4 + X = 11.401754251 Solving -4 + X = 11.401754251 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + X = 11.401754251 + 4 Combine like terms: -4 + 4 = 0 0 + X = 11.401754251 + 4 X = 11.401754251 + 4 Combine like terms: 11.401754251 + 4 = 15.401754251 X = 15.401754251 Simplifying X = 15.401754251

Subproblem 2

X + -4 = -11.401754251 Simplifying X + -4 = -11.401754251 Reorder the terms: -4 + X = -11.401754251 Solving -4 + X = -11.401754251 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + X = -11.401754251 + 4 Combine like terms: -4 + 4 = 0 0 + X = -11.401754251 + 4 X = -11.401754251 + 4 Combine like terms: -11.401754251 + 4 = -7.401754251 X = -7.401754251 Simplifying X = -7.401754251

Solution

The solution to the problem is based on the solutions from the subproblems. X = {15.401754251, -7.401754251}

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