x^2+x-328=0

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Solution for x^2+x-328=0 equation:


Simplifying
x2 + x + -328 = 0

Reorder the terms:
-328 + x + x2 = 0

Solving
-328 + x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '328' to each side of the equation.
-328 + x + 328 + x2 = 0 + 328

Reorder the terms:
-328 + 328 + x + x2 = 0 + 328

Combine like terms: -328 + 328 = 0
0 + x + x2 = 0 + 328
x + x2 = 0 + 328

Combine like terms: 0 + 328 = 328
x + x2 = 328

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 328 + 0.25

Reorder the terms:
0.25 + x + x2 = 328 + 0.25

Combine like terms: 328 + 0.25 = 328.25
0.25 + x + x2 = 328.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 328.25

Calculate the square root of the right side: 18.117670932

Break this problem into two subproblems by setting 
(x + 0.5) equal to 18.117670932 and -18.117670932.

Subproblem 1

x + 0.5 = 18.117670932 Simplifying x + 0.5 = 18.117670932 Reorder the terms: 0.5 + x = 18.117670932 Solving 0.5 + x = 18.117670932 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 18.117670932 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 18.117670932 + -0.5 x = 18.117670932 + -0.5 Combine like terms: 18.117670932 + -0.5 = 17.617670932 x = 17.617670932 Simplifying x = 17.617670932

Subproblem 2

x + 0.5 = -18.117670932 Simplifying x + 0.5 = -18.117670932 Reorder the terms: 0.5 + x = -18.117670932 Solving 0.5 + x = -18.117670932 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -18.117670932 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -18.117670932 + -0.5 x = -18.117670932 + -0.5 Combine like terms: -18.117670932 + -0.5 = -18.617670932 x = -18.617670932 Simplifying x = -18.617670932

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.617670932, -18.617670932}

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