x^2+320x-320=0

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Solution for x^2+320x-320=0 equation:


Simplifying
x2 + 320x + -320 = 0

Reorder the terms:
-320 + 320x + x2 = 0

Solving
-320 + 320x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '320' to each side of the equation.
-320 + 320x + 320 + x2 = 0 + 320

Reorder the terms:
-320 + 320 + 320x + x2 = 0 + 320

Combine like terms: -320 + 320 = 0
0 + 320x + x2 = 0 + 320
320x + x2 = 0 + 320

Combine like terms: 0 + 320 = 320
320x + x2 = 320

The x term is 320x.  Take half its coefficient (160).
Square it (25600) and add it to both sides.

Add '25600' to each side of the equation.
320x + 25600 + x2 = 320 + 25600

Reorder the terms:
25600 + 320x + x2 = 320 + 25600

Combine like terms: 320 + 25600 = 25920
25600 + 320x + x2 = 25920

Factor a perfect square on the left side:
(x + 160)(x + 160) = 25920

Calculate the square root of the right side: 160.99689438

Break this problem into two subproblems by setting 
(x + 160) equal to 160.99689438 and -160.99689438.

Subproblem 1

x + 160 = 160.99689438 Simplifying x + 160 = 160.99689438 Reorder the terms: 160 + x = 160.99689438 Solving 160 + x = 160.99689438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-160' to each side of the equation. 160 + -160 + x = 160.99689438 + -160 Combine like terms: 160 + -160 = 0 0 + x = 160.99689438 + -160 x = 160.99689438 + -160 Combine like terms: 160.99689438 + -160 = 0.99689438 x = 0.99689438 Simplifying x = 0.99689438

Subproblem 2

x + 160 = -160.99689438 Simplifying x + 160 = -160.99689438 Reorder the terms: 160 + x = -160.99689438 Solving 160 + x = -160.99689438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-160' to each side of the equation. 160 + -160 + x = -160.99689438 + -160 Combine like terms: 160 + -160 = 0 0 + x = -160.99689438 + -160 x = -160.99689438 + -160 Combine like terms: -160.99689438 + -160 = -320.99689438 x = -320.99689438 Simplifying x = -320.99689438

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.99689438, -320.99689438}

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