x^2-8x-3840=0

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Solution for x^2-8x-3840=0 equation:


Simplifying
x2 + -8x + -3840 = 0

Reorder the terms:
-3840 + -8x + x2 = 0

Solving
-3840 + -8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '3840' to each side of the equation.
-3840 + -8x + 3840 + x2 = 0 + 3840

Reorder the terms:
-3840 + 3840 + -8x + x2 = 0 + 3840

Combine like terms: -3840 + 3840 = 0
0 + -8x + x2 = 0 + 3840
-8x + x2 = 0 + 3840

Combine like terms: 0 + 3840 = 3840
-8x + x2 = 3840

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 = 3840 + 16

Reorder the terms:
16 + -8x + x2 = 3840 + 16

Combine like terms: 3840 + 16 = 3856
16 + -8x + x2 = 3856

Factor a perfect square on the left side:
(x + -4)(x + -4) = 3856

Calculate the square root of the right side: 62.096698785

Break this problem into two subproblems by setting 
(x + -4) equal to 62.096698785 and -62.096698785.

Subproblem 1

x + -4 = 62.096698785 Simplifying x + -4 = 62.096698785 Reorder the terms: -4 + x = 62.096698785 Solving -4 + x = 62.096698785 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 = 62.096698785 + 4 Combine like terms: -4 + 4 = 0 0 + x = 62.096698785 + 4 x = 62.096698785 + 4 Combine like terms: 62.096698785 + 4 = 66.096698785 x = 66.096698785 Simplifying x = 66.096698785

Subproblem 2

x + -4 = -62.096698785 Simplifying x + -4 = -62.096698785 Reorder the terms: -4 + x = -62.096698785 Solving -4 + x = -62.096698785 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 = -62.096698785 + 4 Combine like terms: -4 + 4 = 0 0 + x = -62.096698785 + 4 x = -62.096698785 + 4 Combine like terms: -62.096698785 + 4 = -58.096698785 x = -58.096698785 Simplifying x = -58.096698785

Solution

The solution to the problem is based on the solutions from the subproblems. x = {66.096698785, -58.096698785}

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