x^2=8x+336

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Solution for x^2=8x+336 equation:


Simplifying
x2 = 8x + 336

Reorder the terms:
x2 = 336 + 8x

Solving
x2 = 336 + 8x

Solving for variable 'x'.

Reorder the terms:
-336 + -8x + x2 = 336 + 8x + -336 + -8x

Reorder the terms:
-336 + -8x + x2 = 336 + -336 + 8x + -8x

Combine like terms: 336 + -336 = 0
-336 + -8x + x2 = 0 + 8x + -8x
-336 + -8x + x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-336 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '336' to each side of the equation.
-336 + -8x + 336 + x2 = 0 + 336

Reorder the terms:
-336 + 336 + -8x + x2 = 0 + 336

Combine like terms: -336 + 336 = 0
0 + -8x + x2 = 0 + 336
-8x + x2 = 0 + 336

Combine like terms: 0 + 336 = 336
-8x + x2 = 336

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 = 336 + 16

Reorder the terms:
16 + -8x + x2 = 336 + 16

Combine like terms: 336 + 16 = 352
16 + -8x + x2 = 352

Factor a perfect square on the left side:
(x + -4)(x + -4) = 352

Calculate the square root of the right side: 18.761663039

Break this problem into two subproblems by setting 
(x + -4) equal to 18.761663039 and -18.761663039.

Subproblem 1

x + -4 = 18.761663039 Simplifying x + -4 = 18.761663039 Reorder the terms: -4 + x = 18.761663039 Solving -4 + x = 18.761663039 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 = 18.761663039 + 4 Combine like terms: -4 + 4 = 0 0 + x = 18.761663039 + 4 x = 18.761663039 + 4 Combine like terms: 18.761663039 + 4 = 22.761663039 x = 22.761663039 Simplifying x = 22.761663039

Subproblem 2

x + -4 = -18.761663039 Simplifying x + -4 = -18.761663039 Reorder the terms: -4 + x = -18.761663039 Solving -4 + x = -18.761663039 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 = -18.761663039 + 4 Combine like terms: -4 + 4 = 0 0 + x = -18.761663039 + 4 x = -18.761663039 + 4 Combine like terms: -18.761663039 + 4 = -14.761663039 x = -14.761663039 Simplifying x = -14.761663039

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.761663039, -14.761663039}

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