x^2-8x-304=0

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Solution for x^2-8x-304=0 equation:


Simplifying
x2 + -8x + -304 = 0

Reorder the terms:
-304 + -8x + x2 = 0

Solving
-304 + -8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '304' to each side of the equation.
-304 + -8x + 304 + x2 = 0 + 304

Reorder the terms:
-304 + 304 + -8x + x2 = 0 + 304

Combine like terms: -304 + 304 = 0
0 + -8x + x2 = 0 + 304
-8x + x2 = 0 + 304

Combine like terms: 0 + 304 = 304
-8x + x2 = 304

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 = 304 + 16

Reorder the terms:
16 + -8x + x2 = 304 + 16

Combine like terms: 304 + 16 = 320
16 + -8x + x2 = 320

Factor a perfect square on the left side:
(x + -4)(x + -4) = 320

Calculate the square root of the right side: 17.88854382

Break this problem into two subproblems by setting 
(x + -4) equal to 17.88854382 and -17.88854382.

Subproblem 1

x + -4 = 17.88854382 Simplifying x + -4 = 17.88854382 Reorder the terms: -4 + x = 17.88854382 Solving -4 + x = 17.88854382 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 = 17.88854382 + 4 Combine like terms: -4 + 4 = 0 0 + x = 17.88854382 + 4 x = 17.88854382 + 4 Combine like terms: 17.88854382 + 4 = 21.88854382 x = 21.88854382 Simplifying x = 21.88854382

Subproblem 2

x + -4 = -17.88854382 Simplifying x + -4 = -17.88854382 Reorder the terms: -4 + x = -17.88854382 Solving -4 + x = -17.88854382 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 = -17.88854382 + 4 Combine like terms: -4 + 4 = 0 0 + x = -17.88854382 + 4 x = -17.88854382 + 4 Combine like terms: -17.88854382 + 4 = -13.88854382 x = -13.88854382 Simplifying x = -13.88854382

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.88854382, -13.88854382}

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